Comment 12 for bug 791213

Added libqt-declarative in Arch Linux, as it was confirmed there by Andrea Scarpino (http://bugreports.qt.nokia.com/browse/QTBUG-19736?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=156025#comment-156025). Added Qt (also without a link, since Launchpad doesn't integrate with JIRA) while I was at it. I hope these additions are considered correct; if not, marking them Invalid won't hurt my feelings. ;-)