SVN commit 8291 by fluffy:
- Do not clobber QMAKE_CC/QMAKE_CXX with default values (gcc/g++) for ports
compilers (lang/gcc4*) in corresponded mkspecs
Bug was introduced with qt48 branch, should be passed upstream after verification
M +19 -0 patch-qt4-before-ports-in-mkspecs.diff