Add changes file for Qt 5.12.1

+ 33966b5b9b Stop using wildcards with "direct" RESOURCES syntax in examples
+ e236382e8c Bump version
+ 431d605edb Add changes file for Qt 5.11.3
+ 8317e62c3e Fix compilation with qreal=float
+ 343cea9b49 QQuickScrollView: override getContentWidth/Height()
+ 60a43aeba7 Doc: Add qmake include flag for module
+ e25970ffff qquickfusionstyle: do not force a fixed blue color as highlight color
+ ccf9a78e36 Doc: add "1" to all mentions of the old Qt Quick Controls
+ da55026c97 Fix compilation with gcc 4.8
+ 1dff93937d Doc: clarify event handling
+ bbd6c99722 Fix QQuickIconLabel's baselineOffset
+ 98b6f8eee9 Port QQuickComboBox to QRegularExpression
+ 70199a43a9 Fix for SpinBox crash in Qt Quick Designer
+ 05597ef3e5 Doc: Update \titles with "Controls 2" in it
+ 021c6064ad tst_QQuickStyle::availableStyles(): Ignore case when checking paths on Windows
+ b943bbf911 Make it visually clear which ComboBox item is the current item
+ 69f02184a9 QQuickComboBox: update QRegularExpression wildcard code
+ 1006eb36e5 Add binary compatibility file for QtQuickĆontrols2 for Qt 5.12
+ b563bd583a Fix TextField background not respecting control's width
+ 520657bdfa Bump version

Change-Id: Id659474f4566319efa559797fd07d0977dd5aff1
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>

dist/changes-5.12.1

@@ -0,0 +1,20 @@
+Qt 5.12.1 is a bug-fix release. It maintains both forward and backward
+compatibility (source and binary) with Qt 5.12.0.
+
+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 5.12 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.