ui-toolkit fails some tests against Qt 5.1.1

I think this is the highest priority fix, followed by OSK & QPA bugs, related to 5.1.1 issues.

When I try to build it with DEB_BUILD_OPTIONS=nocheck, I get another crash in qdoc code, reported as https://bugreports.qt-project.org/browse/QTBUG-33387.

With two of the linked branches the package now builds with DEB_BUILD_OPTIONS=nocheck. The third branch (the qtdeclarative one) fixes the segfault in tests. Some tests still fail, however, I hope that some ubuntu-ui-toolkit devs can look at that.

I'm building updated qtbase and qtdeclarative with mitya57's much appreciated patches at https://launchpad.net/~canonical-qt5-edgers/+archive/qt5-beta2/+packages and copying them over to qt5-beta-proper once ready and I've smoketested them on device.

The remaining problems probably need to be fixed inside ubuntu-ui-toolkit like Dmitry mentioned.

The remaining problems are all in tst_Layouts. If I comment that out, tests finish successfully (docs building needs mitya57's branch merged).

The tst_Layouts have Totals: 13 passed, 18 failed, 0 skipped

---
********* Start testing of tst_Layouts *********
Config: Using QtTest library 5.1.1, Qt 5.1.1
PASS : tst_Layouts::initTestCase()
PASS : tst_Layouts::testCase_NoLayouts()
QWARN : tst_Layouts::testCase_SimpleLayout() QFontDatabase: Cannot find font directory '/usr/lib/x86_64-linux-gnu/fonts' - is Qt installed correctly?
QWARN : tst_Layouts::testCase_SimpleLayout() QFontDatabase: Cannot find font directory '/usr/lib/x86_64-linux-gnu/fonts' - is Qt installed correctly?
QWARN : tst_Layouts::testCase_SimpleLayout() QFontDatabase: Cannot find font directory '/usr/lib/x86_64-linux-gnu/fonts' - is Qt installed correctly?
QWARN : tst_Layouts::testCase_SimpleLayout() QFontDatabase: Cannot find font directory '/usr/lib/x86_64-linux-gnu/fonts' - is Qt installed correctly?
QWARN : tst_Layouts::testCase_SimpleLayout() QFontDatabase: Cannot find font directory '/usr/lib/x86_64-linux-gnu/fonts' - is Qt installed correctly?
QWARN : tst_Layouts::testCase_SimpleLayout() QFontDatabase: Cannot find font directory '/usr/lib/x86_64-linux-gnu/fonts' - is Qt installed correctly?
FAIL! : tst_Layouts::testCase_SimpleLayout() 'item->parentItem()->parentItem()->inherits("QQuickColumn")' returned FALSE. ()
   Loc: [tst_layouts.cpp(124)]
FAIL! : tst_Layouts::testCase_SimpleLayout_Medium() 'item->parentItem()->parentItem()->inherits("QQuickFlow")' returned FALSE. ()
   Loc: [tst_layouts.cpp(151)]
FAIL! : tst_Layouts::testCase_SimpleLayout_Large() 'item->parentItem()->parentItem()->inherits("QQuickRow")' returned FALSE. ()
   Loc: [tst_layouts.cpp(178)]
PASS : tst_Layouts::testCase_OverlappingCondition()
PASS : tst_Layouts::testCase_ExternalLayouts()
PASS : tst_Layouts::testCase_ExternalLayouts_Medium()
PASS : tst_Layouts::testCase_ExternalLayouts_Large()
PASS : tst_Layouts::testCase_NestedLayouts()
FAIL! : tst_Layouts::testCase_NestedLayouts_ExtraLarge() Compared values are not the same
   Actual (root->property("nestedLayout").toString()):
   Expected (QString("medium")): medium
   Loc: [tst_layouts.cpp(267)]
FAIL! : tst_Layouts::testCase_ResizingContainers() Compared doubles are not the same (fuzzy compare)
   Actual (item->width()): 400
   Expected (UCUnits::instance().gu(10)): 80
   Loc: [tst_layouts.cpp(290)]
QWARN : tst_Layouts::testCase_CurrentLayoutChange() file:///home/bigfiles/qt5/com/build-area/ubuntu-ui-toolkit-0.1.46+13.10.20130903.4/tests/unit/tst_layouts/CurrentLayoutChange.qml:30:13: QML ConditionalLayout: ERROR: no container specified for layout "portrait". ConditionalLayout cannot be activated without a container.
QWARN : tst_Layouts::testCase_CurrentLayoutChange() file:///home/bigfiles/qt5/com/build-area/ubuntu-ui-toolkit-0.1.46+13.10.20130903.4/tests/unit/tst_layouts/CurrentLayoutChange.qml:35:13: QML ConditionalLayout: ERROR: no container specified for layout "landscape". ConditionalLayout cannot be activated without a container.
QWARN : tst_Layouts::testCase_CurrentLayoutChange() file:///home/bigfiles/qt5/com/build-area/ubuntu-ui-toolkit-0.1.46+13.10.20130903.4/tests/unit/tst_layouts/CurrentLayoutChange.qml:30:13: QML ConditionalLayout: WARNING: Cannot activate layout "portrait" with no container specified. Falling b...

lower importance given 5.1 will be deferred

Continued in bug #1256235 for Qt 5.2.

This bug was fixed in the package qtbase-opensource-src - 5.2.1+dfsg-1ubuntu7

---------------
qtbase-opensource-src (5.2.1+dfsg-1ubuntu7) trusty; urgency=medium

  [ Colin Watson ]
  * Add arm64 to archs that don't use -m64

qtbase-opensource-src (5.2.1+dfsg-1ubuntu6) trusty; urgency=medium

  * Add Use-None-instead-of-GLX_NONE.patch:
    - Cherry-pick upstream patch (LP: #1288278)

qtbase-opensource-src (5.2.1+dfsg-1ubuntu5) trusty; urgency=medium

  * Only run tests on armhf, amd64 and i386.

qtbase-opensource-src (5.2.1+dfsg-1ubuntu4) trusty; urgency=medium

  [ Chris Gagnon ]
  * Enable unit tests

qtbase-opensource-src (5.2.1+dfsg-1ubuntu3) trusty; urgency=medium

  * Revert the transitional package change final landing.

qtbase-opensource-src (5.2.1+dfsg-1ubuntu2) trusty; urgency=medium

  * libqt5core5 transitional package to be able to run ABI related tests

qtbase-opensource-src (5.2.1+dfsg-1ubuntu1) trusty; urgency=low

  [ Dmitry Shachnev ]
  * Update watch file (taken from Debian).
  * Fix generating documentation by building qdoc before using it.
  * Remove qtcreator.qdoc from qtbase5-doc.install, as it is already in
    qtbase5-dev.install.
  * Merge with Debian up to 5.2.0~beta1+dfsg-3.
    - Fixes build failures on powerpc and armel.
  * Add debian/patches/fix_cppcodemarker_crash.patch to fix qdoc
    crash that caused ubuntu-ui-toolkit to FTBFS (LP: #1217331).

  [ Łukasz 'sil2100' Zemczak ]
  * Cherry-pick two submitted patches to support appmenu-qt: (LP: #1157213)
    - make_qkdetheme_constructor_public.diff
    - platformtheme_env.diff

  [ Timo Jyrinki ]
  * New upstream release 5.2.1 (LP: #1256341) (LP: #1223032) (LP: #1222988)
    (LP: #1223042) (LP: #1253120) (LP: #1251262)
  * Sync with Debian 5.2.0+dfsg-7, remaining changes:
    - Remove firebird and ibase dependencies
    - Maintainer fields and Vcs-Bzr
    - No gdb required on ppc64el
    - Provides: qt-default to qt5-default
    - Define explicit list on which archs openvg required
    - Additional patches:
      + disable_overlay_scrollbars.diff
      + load_testability_from_env_var.patch
      + make_qkdetheme_constructor_public.diff
      + platformtheme_env.diff
      + qdoc-Fix-crash-in-Generator-generateInnerNode.patch
      + 0001-Do-not-overwrite-basePixmap-of-QIconLoader-PixmapEnt.patch
    - Use our symbols files
    - Additional multi-arch packages (not correct policy-wise)
  * Drop upstream patches:
    - add_since_52_to_new_QColor_features.patch
    - fix_cppcodemarker_crash.patch
    - fix_usr-move_workaround_in_the_presence_of_multi-arch.patch
    - make_QColor_understand_AARRGGBB.patch
    - Add-workaround-for-GL-on-Android-emulator.patch
    - 0001-Do-not-overwrite-basePixmap-of-QIconLoader-PixmapEnt.patch
    - fix_destroy_qapp_segfault.diff
  * Remove Ubuntu patches:
    - enable_appmenu_support.diff (obsolete)
    - 0001-Implement-XEmbed-protocol.patch (submitted and merged upstream)
    - fix_maliit_activation.patch (not used anymore)
    - inputmethod_fix_focusout.patch (not used anymore)
    - fix_number_precision_qjsondocument.patch_8e8becdc.patch (upstream)
    - bug1227629.patch (merged upstream)
    - fix_rowinserted.patch (LP: #1242630...