Merge remote-tracking branch 'origin/5.12.2' into 5.12

Change-Id: Ic3485054ca68580cd2bf08e37262ad92073f00c8

dist/changes-5.12.2

+Qt 5.12.2 is a bug-fix release. It maintains both forward and backward
+compatibility (source and binary) with Qt 5.12.0 through 5.12.1.
+
+For more details, refer to the online documentation included in this
+distribution. The documentation is also available online:
+
+https://doc.qt.io/qt-5/index.html
+
+The Qt version 5.12 series is binary compatible with the 5.11.x series.
+Applications compiled for 5.11 will continue to run with 5.12.
+
+Some of the changes listed in this file include issue tracking numbers
+corresponding to tasks in the Qt Bug Tracker:
+
+https://bugreports.qt.io/
+
+Each of these identifiers can be entered in the bug tracker to obtain more
+information about a particular change.
+
+ - This release contains only minor code improvements.
+
+****************************************************************************
+*                            Qt 5.12.2 Changes                             *
+****************************************************************************
+
+- Fixed a crash in the media player when an application is exited while a media player is still playing.
+
+****************************************************************************
+*                      Platform Specific Changes                           *
+****************************************************************************
+
+Gstreamer
+---------
+
+ - [QTBUG-39327] Introduced possibility to set custom pipeline using gst-pipeline url scheme.
+
+Android
+-------
+
+ - [QTBUG-67280] Fixed memory leak of GL resources when DeferredDelete event is not delivered.
+
+DirectShow
+----------
+
+ - [QTBUG-73461] Fixed a crash when camera is being destroyed.