gtk4 4.4.0+ds1-3 source package in Ubuntu

Changelog

gtk4 (4.4.0+ds1-3) experimental; urgency=medium

  * Disable Broadway (HTML) backend.
    It isn't clear whether this is used in practice. If we disable it now,
    enabling it later if requested will not be an ABI break, but if we
    enable it now, we have to keep it enabled indefinitely.
  * d/missing-sources: Add source for libX11-derived compose sequences.
    By trial and error, the files in gtk/compose/ seem to be generated from
    libX11 1.7.0.
  * d/p/compose-Generate-endian-dependent-compact-Compose-data.patch,
  * Add proposed patch to use big-endian compose data on big-endian host,
    keeping the existing little-endian version for little-endian hosts.
    This resolves a FTBFS caused by test failure on s390x and other
    big-endian ports.
  * d/p/compose-Document-how-to-get-compose-parse-input-from-libX.patch
    Document how to reproduce the compose data. We don't do this at build
    time, because the compose data is relatively rarely updated, and
    during cross-compilation that would require building all of GTK for
    both the build and host architectures.
  * d/p/compose-Update-sequences-from-libX11-1.7.2.patch:
    Update compose data from libX11 1.7.2.
    This adds a few missing compose sequences.

 -- Simon McVittie <email address hidden>  Mon, 30 Aug 2021 13:33:17 +0100