Merge remote-tracking branch 'origin/5.4.2' into 5.4

Change-Id: I1e9993873a52dfe59adcb5479e131495854b17be

dist/changes-5.4.2

+Qt 5.4.2 is a bug-fix release. It maintains both forward and backward
+compatibility (source and binary) with Qt 5.4.0.
+
+For more details, refer to the online documentation included in this
+distribution. The documentation is also available online:
+
+  http://doc.qt.io/qt-5/index.html
+
+The Qt version 5.4 series is binary compatible with the 5.3.x series.
+Applications compiled for 5.3 will continue to run with 5.4.
+
+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.
+
+****************************************************************************
+*                          Library                                         *
+****************************************************************************
+
+ - This release contains only minor code improvements.