Add changes file for Qt 5.10.1

Change-Id: Ia7f7361c85e99999fb13840f4c469240171bedb8
Reviewed-by: Andy Shaw <andy.shaw@qt.io>

dist/changes-5.10.1

+Qt 5.10.1 is a bug-fix release. It maintains both forward and backward
+compatibility (source and binary) with Qt 5.10.0.
+
+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 5.10 series is binary compatible with the 5.9.x series.
+Applications compiled for 5.9 will continue to run with 5.10.
+
+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 all fixes included in the Qt 5.9.4 release.
+
+****************************************************************************
+*                            Qt 5.10.1 Changes                             *
+****************************************************************************
+
+ - This release contains only minor code improvements.