Fix release-with-debuginfo flags for QCC

Due to the way that the QCC mkspecs are structured, the recent
change to add full optimization support causes the -O2 flag to
be completely dropped from QCC builds in release-with-debuginfo
mode, since the QMAKE_CFLAGS_OPTIMIZE variable is not declared
in any configuration file included by QCC toolchains.  This patch
adds the necessary flags to make the QCC toolchain operate correctly.

Change-Id: I4cd93442d59fae7c92fc5219cddb16f367447203
Reviewed-by: Rafael Roquetto <rafael.roquetto@kdab.com>
Improve QElapsedTimer resolution on QNX

The standard POSIX clock functions are present on QNX, but only
return timing information with millisecond accuracy.  To get
accuracy beyond that, platform-specific functions must be used.

Change-Id: I54a0550f1865dbea3c60a86ecd8ad99df3fe42b4
Reviewed-by: Frank Osterfeld <frank.osterfeld@kdab.com>
Reviewed-by: Bernd Weimer <bweimer@blackberry.com>
Reviewed-by: Rafael Roquetto <rafael.roquetto@kdab.com>
iOS: Make hide-keyboard gesture use normal UIGestureRecognizer flow

Allows us to track state through the normal gesture recognizer states
instead of custom variables.

Change-Id: I4fe1b370a581132a9bbb8f51f7bee73381b80341
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@digia.com>
iOS: Allow virtual keyboard to be hidden by QInputMethod::hide()

Calling the function has the same effect as dismissing the keyboard using
the native keyboard dismiss button or the hide-keyboard gesture, and will
result in the QIOSTextInputResponder losing first-responder status and
the current focus object being cleared.

QtWidgets and other parts of Qt will try to hide the keyboard during
focus changes between widgets, which we already take care of when the
focus object changes, so we detect the situation and ignore it, by
requiring that the current focus object matches the one we've brought
up the text responder for.

Showing the virtual keyboard is still a no-op, as there is no way to
show the virtual keyboard without a focus-object.

Change-Id: Iefcb403c2b6d3da8a4df3fcd53bc1244ba9c4d23
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@digia.com>
Place the Qt plugin metadata in a PE-COFF section with MinGW too

Commit ec360d7ad90945273c7d96c9a159131dcbcd67c3 made it work for ELF
platforms, Apple platforms and for MSVC, but we apparently forgot it for
MinGW. This patch corrects that mistake.

We won't have the PE-COFF section parser until 5.5, but this will at
least making Qt 5.4-built plugins work on the faster case.

Change-Id: I51b06837dc321eaa4724c9598293cf85570f67fc
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Compile fix for QT_NO_DOCKWIDGET in QtWidgets

Change-Id: I4567e4d0e5738c1de74661a325895f9eaa1d06c4
Reviewed-by: Laszlo Agocs <laszlo.agocs@digia.com>