Add changes file for 4.6.2

Change-Id: If2012dc8a6deb26e1f55205e4d772645553c6f57
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@qt.io>

dist/changes-4.6.2.md

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+Qt Creator version 4.6.2 contains bug fixes.
+
+The most important changes are listed in this document. For a complete
+list of changes, see the Git log for the Qt Creator sources that
+you can check out from the public Git repository. For example:
+
+    git clone git://code.qt.io/qt-creator/qt-creator.git
+    git log --cherry-pick --pretty=oneline v4.6.1..v4.6.2
+
+General
+
+QMake Projects
+
+* Fixed reparsing after changes (QTCREATORBUG-20113)
+
+Qt Support
+
+* Fixed detection of Qt Quick Compiler in Qt 5.11 (QTCREATORBUG-19993)
+
+C++ Support
+
+* Fixed flags for C files with MSVC (QTCREATORBUG-20198)
+
+Debugging
+
+* Fixed crash when attaching to remote process (QTCREATORBUG-20331)
+
+Platform Specific
+
+macOS
+
+* Fixed signature of pre-built binaries (QTCREATORBUG-20370)
+
+Android
+
+* Fixed path to C++ includes (QTCREATORBUG-20340)
+
+QNX
+
+* Fixed restoring deploy steps (QTCREATORBUG-20248)
+
+Credits for these changes go to:  
+Alessandro Portale  
+André Pönitz  
+Christian Stenger  
+Eike Ziller  
+Ivan Donchevskii  
+Oswald Buddenhagen  
+Robert Löhning  
+Ulf Hermann  
+Vikas Pachdha