GccToolChain: Shorten and move gccPredefinedMacroOptions
GccToolChain: Shorten and move gccPredefinedMacroOptions

Code cosmetics: Shorten gccPredefinedMacroOptions and move it to
the method that is actually related to that functionality.

Change-Id: I8aae1fd89f58d798f5bec95f16c7b92c44546e4d
Reviewed-by: Daniel Teske <d8a411aec9a206efedb4d45b75fe8d13f1e2b628@digia.com>

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