CppEditor: override -> Q_DECL_OVERRIDE
CppEditor: override -> Q_DECL_OVERRIDE

Pre g++4.7 compilers don't know override.

Change-Id: I07306ebe4f9161bb3806e9b4d1d4a143448c0033
Reviewed-by: Eskil Abrahamsen Blomfeldt <e4034124b095075783ce739a2d1c68c0d66fa1fd@theqtcompany.com>

Distrotech/qtcreator,martyone/sailfish-qtcreator,xianian/qt-creator,kuba1/qtcreator,Distrotech/qtcreator,martyone/sailfish-qtcreator,danimo/qt-creator,kuba1/qtcreator,kuba1/qtcreator,kuba1/qtcreator,danimo/qt-creator,danimo/qt-creator,martyone/sailfish-qtcreator,xianian/qt-creator,Distrotech/qtcreator,xianian/qt-creator,Distrotech/qtcreator,danimo/qt-creator,martyone/sailfish-qtcreator,xianian/qt-creator,danimo/qt-creator,xianian/qt-creator,Distrotech/qtcreator,martyone/sailfish-qtcreator,xianian/qt-creator,martyone/sailfish-qtcreator,danimo/qt-creator,Distrotech/qtcreator,martyone/sailfish-qtcreator,martyone/sailfish-qtcreator,kuba1/qtcreator,xianian/qt-creator,kuba1/qtcreator,danimo/qt-creator,kuba1/qtcreator,kuba1/qtcreator,danimo/qt-creator,xianian/qt-creator,kuba1/qtcreator,martyone/sailfish-qtcreator,danimo/qt-creator,xianian/qt-creator,Distrotech/qtcreator