Add changes file for Qt 5.14.0

Change-Id: I732c5ea27eb048dadd29bc7756d94907567f312c
Reviewed-by: Eirik Aavitsland <eirik.aavitsland@qt.io>

dist/changes-5.14.0

@@ -0,0 +1,35 @@
+Qt 5.14 introduces many new features and improvements as well as bugfixes
+over the 5.13.x series. 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 5.14 series is binary compatible with the 5.13.x series.
+Applications compiled for 5.13 will continue to run with 5.14.
+
+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.
+
+****************************************************************************
+*                                   TIFF                                   *
+****************************************************************************
+
+- Added support for reading and writing colorspace profiles
+- Corrected 16 to 8 bit color channel conversion when reading color maps
+
+****************************************************************************
+*                                   WEBP                                   *
+****************************************************************************
+
+- Added support for reading and writing colorspace profiles
+
+****************************************************************************
+*                             Third-Party Code                             *
+****************************************************************************
+
+ - Bundled libtiff was updated to version 4.1.0