Dummy window for creating GLX context should be override redirect

Without having the dummy window being override redirect Qt might
confuse window managers. Window managers might react on the create
notify event, but there is no reason to do anything with the window
as it is most likely already destroyed at the time the window manager
receives the create notify event.

By marking the window as override redirect we indicate to the window
manager that they can ignore it.

Change-Id: I35259436da4548f4190b92de412fb0de1d2e8077
Reviewed-by: Uli Schlachter <psychon@znc.in>
Reviewed-by: Laszlo Agocs <laszlo.agocs@digia.com>
Accessibility: Fix rect for QComboBox and QRadioButton

This is especially relevant on mobile devices where screen readers often
send mouse clicks to the middle of the object.

Task-number: QTBUG-39100
Change-Id: I5972f21dd12434601d86136215ab9b61248c9691
Reviewed-by: Jan Arve Sæther <jan-arve.saether@digia.com>
QSaveFile: follow symbolic links

[ChangeLog][QtCore][QSaveFile] Now follows symbolic links while writing to
a link instead of replacing the link with the contents.

Change-Id: I5afd519cb9f96ae68fa4c23c33a18de75671a301
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Reviewed-by: David Faure <david.faure@kdab.com>
Fix QMAKE_EXTRA_COMPILERS' depend_command being ignored

A typo caused qmake to stop output dependency information
added by the depend_command clause.

Task-number: QTBUG-13334
Change-Id: I00fabc87438ce94e80341e6f88aa2e0eaab57e19
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@digia.com>