updatyed cmssw and cmssw-patch to make use of scram_compiler and extra_tools fro clang and icc builds
Merge pull request #926 from smuzaffar/IB/CMSSW_7_2_X/stable

updatyed cmssw and cmssw-patch to make use of scram_compiler and extra_tools for clang and icc builds
Merge remote-tracking branch 'origin/IB/CMSSW_7_2_X/stable' into IB/CMSSW_7_0_X/stable