unity8 fails to start on armhf with Qt 5.4.0

Timo can you please try adding https://codereview.qt-project.org/#/c/102257/ to the packages?

It seems to fix the crash / symbol issue. I've filed bug #1403758 on the next issue.

This bug was fixed in the package qtbase-opensource-src - 5.4.0+dfsg-4ubuntu2

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qtbase-opensource-src (5.4.0+dfsg-4ubuntu2) vivid; urgency=medium

  [ Timo Jyrinki ]
  * New upstream release.
  * debian/patches/qimage_conversions.cpp-Fix-little-endian-build.patch:
    - Fix PowerPC build (LP: #1400244)
  * Remove patches:
    - debian/patches/Always-lock-the-DBus-dispatcher-before-dbus_connecti.patch
    - debian/patches/Don-t-always-chmod-the-XDG_RUNTIME_DIR.patch
    - debian/patches/Fix-crash-in-QNetworkAccessCacheBackend-closeDownstr.patch
    - debian/patches/Partially-revert-Fix-a-deadlock-introduced-by-the-ra.patch
    - debian/patches/QDBusConnection-Merge-the-dispatch-and-the-watch-and.patch
    - debian/patches/Report-the-system-error-on-why-chmod-2-failed-in-XDG.patch
    - debian/patches/Reset-QNAM-s-NetworkConfiguration-when-state-changes.patch
    - debian/patches/Support-dual-sim-in-QtBearer-s-networkmanager-backen.patch
    - debian/patches/Use-a-property-cache-to-cut-down-on-blocking-calls.patch
    - debian/patches/dbus_correct_signal_name_disconnect.patch
    - debian/patches/fix_bug_in_internal_comparison_operator.patch
    - debian/patches/fix_sparc_atomics.patch
    - debian/patches/prefer_qpa_for_systemtrayicon.patch
    - debian/patches/update-QtBearer-NetworkManager-backend-API.patch
  * Include the networkmanager backend changes from 5.4.1
  * Bump ABI version to 5.4.0
  * debian/patches/Resolve-GLES3-functions-from-the-shared-lib.patch
    - Fix usage on OpenGL ES2 platforms (LP: #1403511)
  * Sync with Debian 5.4.0+dfsg-4
  * debian/patches/enable-tests.patch:
    - Refresh and enable for 5.4.0 (LP: #1403582)
    - Disable the tests for new QStorageInfo class which partially fail
    - Disable some widgets tests that fail (desktop only)
    - Disable one qlogging test
  * Drop reduce-relocations option from configure, since it causes black screen
    for Unity8 on armhf because of linking problems. Comment out the related
    revert of earlier upstream commit. (LP: #1403758)
  * debian/patches/Add-C++11-if-available-for-QVariant-autotest.patch
    - Fix tst_qvariant (LP: #1408273)

  [ Łukasz 'sil2100' Zemczak ]
  * debian/patches/enable_pie.patch:
    - Add fix for QObject::connect failing on ARM

qtbase-opensource-src (5.4.0+dfsg-4) experimental; urgency=medium

  * debian/patches/bsd_statfs.diff: Third attempt to fix the build
    failure on kfreebsd.
  * Update symbols files for mips.

qtbase-opensource-src (5.4.0+dfsg-3) experimental; urgency=medium

  * More debian/copyright updates.
  * Do not ship htmlinfo example which contains non-free HTML pages.
  * Drop remove_icon_from_example.patch and remove_google_adsense.patch,
    no longer needed with the above change.
  * Update symbols files with buildds’ logs.
  * debian/patches/bsd_statfs.diff: Second attempt to fix the build
    failure.

qtbase-opensource-src (5.4.0+dfsg-2) experimental; urgency=medium

  * Add a patch to fix qstorageinfo_unix.cpp build on kFreeBSD.
  * Add a patch to fix qimage_conversions.cpp build on big endian
    systems.
  * Update symbols files with buildds’ logs.

qtbase-opensource-src (5.4.0+dfsg-1) experimental; ur...