GccToolchain: Do not warn about invalid defines on failed runs
GccToolchain: Do not warn about invalid defines on failed runs

Do not warn that the macro data is invalid if gcc failed to run. This
avoids spurious warnings when giving a non-executable file, etc.

Change-Id: I52d731bf2b9a6fc12faaa74d70488125bffd9299
Reviewed-by: Daniel Teske <d8a411aec9a206efedb4d45b75fe8d13f1e2b628@digia.com>

danimo/qt-creator,colede/qtcreator,omniacreator/qtcreator,Distrotech/qtcreator,danimo/qt-creator,kuba1/qtcreator,kuba1/qtcreator,maui-packages/qt-creator,AltarBeastiful/qt-creator,xianian/qt-creator,danimo/qt-creator,omniacreator/qtcreator,martyone/sailfish-qtcreator,kuba1/qtcreator,xianian/qt-creator,amyvmiwei/qt-creator,colede/qtcreator,xianian/qt-creator,farseerri/git_code,xianian/qt-creator,darksylinc/qt-creator,darksylinc/qt-creator,amyvmiwei/qt-creator,maui-packages/qt-creator,martyone/sailfish-qtcreator,colede/qtcreator,farseerri/git_code,maui-packages/qt-creator,richardmg/qtcreator,richardmg/qtcreator,maui-packages/qt-creator,maui-packages/qt-creator,omniacreator/qtcreator,omniacreator/qtcreator,Distrotech/qtcreator,richardmg/qtcreator,farseerri/git_code,Distrotech/qtcreator,colede/qtcreator,Distrotech/qtcreator,kuba1/qtcreator,xianian/qt-creator,maui-packages/qt-creator,AltarBeastiful/qt-creator,richardmg/qtcreator,amyvmiwei/qt-creator,darksylinc/qt-creator,xianian/qt-creator,martyone/sailfish-qtcreator,colede/qtcreator,kuba1/qtcreator,kuba1/qtcreator,richardmg/qtcreator,martyone/sailfish-qtcreator,omniacreator/qtcreator,martyone/sailfish-qtcreator,darksylinc/qt-creator,kuba1/qtcreator,AltarBeastiful/qt-creator,AltarBeastiful/qt-creator,martyone/sailfish-qtcreator,kuba1/qtcreator,danimo/qt-creator,amyvmiwei/qt-creator,omniacreator/qtcreator,amyvmiwei/qt-creator,danimo/qt-creator,amyvmiwei/qt-creator,martyone/sailfish-qtcreator,darksylinc/qt-creator,xianian/qt-creator,farseerri/git_code,AltarBeastiful/qt-creator,AltarBeastiful/qt-creator,darksylinc/qt-creator,danimo/qt-creator,danimo/qt-creator,Distrotech/qtcreator,farseerri/git_code,martyone/sailfish-qtcreator,danimo/qt-creator,richardmg/qtcreator,farseerri/git_code,amyvmiwei/qt-creator,darksylinc/qt-creator,danimo/qt-creator,farseerri/git_code,farseerri/git_code,AltarBeastiful/qt-creator,maui-packages/qt-creator,omniacreator/qtcreator,darksylinc/qt-creator,AltarBeastiful/qt-creator,xianian/qt-creator,Distrotech/qtcreator,xianian/qt-creator,colede/qtcreator,kuba1/qtcreator,Distrotech/qtcreator,amyvmiwei/qt-creator,richardmg/qtcreator,colede/qtcreator,martyone/sailfish-qtcreator