don't add qbs-related flags to CONFIG over and over again
don't add qbs-related flags to CONFIG over and over again

Change-Id: I0ca49213d45ab7ab193266bbbc7f201cecdc6eac
Reviewed-by: Christian Kandeler <3aa99dcdd3f0cac61fb81c2a11771c0cc2497607@digia.com>

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