Add changes file for Qt 5.11.3

+ a51ddb2cd2 Remove conflicting anchor targets from the sidebar
+ a2aecd1264 Update minimum freetype version
+ 9dc1f60bcb Doc: Fix links to build requirements pages
+ 4fbe46da11 QNX: Update platform and compiler notes
+ 22572163e4 Fix a link to a Qt Creator tutorial
+ 8a1e70b463 Document how to create an .ico file from a set of images using ImageMagick
+ 4c131661e2 Properly document license of Qt examples
+ 94e64d551f Doc: Fix the broken link to the Qt for Device Creation docs
+ 9558eaf080 Doc: Change the \section2 title to avoid wrong links
+ db16cdb8e6 Doc: Use explicit links to fix broken links to Qt WebEngine module
+ c6e73db4f5 Doc: fix typo
+ ec6883bd7c Doc: Remove broken link from iOS documentation
+ 9c8b608839 Bump version

Change-Id: I4bbcf08d97e428b99f9001765b28431d571b73a0
Reviewed-by: Paul Wicking <paul.wicking@qt.io>
Reviewed-by: Topi Reiniö <topi.reinio@qt.io>
Reviewed-by: Martin Smith <martin.smith@qt.io>

dist/changes-5.11.3

@@ -0,0 +1,20 @@
+Qt 5.11.3 is a bug-fix release. It maintains both forward and backward
+compatibility (source and binary) with Qt 5.11.0 through 5.11.2.
+
+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 5.11 series is binary compatible with the 5.10.x series.
+Applications compiled for 5.10 will continue to run with 5.11.
+
+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.