Android: Fix orientation change on Android 4.3

In Android 4.3, we will get a new native window pointer for the
same surface (the old surface has not been destroyed), whereas
before we would get the same pointer, thus hitting the
"sameNativeWindow" branch. This revealed some bugs in the
surfaceChanged code path when the old surface had not been
destroyed. This path is now taken both when there's no old surface
(the app has been suspended in the mean time) and when the
orientation changes.

To handle the second case, we need to make sure:
1. We update the static pointer
2. We update the pointers in the platform windows
3. We don't add a second reference to the static data for
windows
4. We schedule an update of the window size

Task-number: QTBUG-32878
Change-Id: I47257615f9ba820315fc98d7a804e52223f430bf
Reviewed-by: Christian Stromme <christian.stromme@digia.com>
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@digia.com>
Add changes-5.1.1 file

Change-Id: I8b447d1f30918fd31f00bd56cc3eb2f203b847a3
Reviewed-by: Jani Heikkinen <jani.heikkinen@digia.com>
Reviewed-by: Iikka Eklund <iikka.eklund@digia.com>
Don't use qt_mac_get_fixed_pitch() to resolve fixed pitch fonts on OSX

The call was resulting in inifinite recursion on OSX 10.9 when Qt was
built against the 10.7 SDK, as qt_mac_get_fixed_pitch uses QFontMetrics
to resolve the pitch, and we would end up in the font resolver again
when asking for the metrics.

The CoreText font-database already takes care of resolving whether or
not a font family is fixed-pitch, so the code is likely a leftover
from the ATSUI-days, and can be removed.

Task-number: QTBUG-31803
Change-Id: I37c90fa637927eb4adc16c0fd556c4c46c456034
Reviewed-by: Gabriel de Dietrich <gabriel.dedietrich@digia.com>
(cherry picked from commit bd9a023a41209a216eec28bd25a20372a5172b6a)
Reviewed-by: Jani Heikkinen <jani.heikkinen@digia.com>
Reviewed-by: Iikka Eklund <iikka.eklund@digia.com>
Merge remote-tracking branch 'origin/release' into stable

Change-Id: I815757e33b6c0b1e702c8e386e8e30307f78e318