Fix qbs plugins path on OS X.
Fix qbs plugins path on OS X.

Change-Id: I6f6c88fdc9925e308b3032a41b4e1400a8e32952
Reviewed-by: Jake Petroules <2d627e1cecd5435752fa500bacbe05f7cc90c369@petroules.com>

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