Disable cuda, opencl and opencl-cpp.
Merge pull request #853 from degano/cuda_patch_62X_stable

Disable cuda, opencl and opencl-cpp.
Backport from 72X scramv1.
Merge pull request #854 from degano/scramv1_62X_stable

Backport from 72X scramv1.
Merge remote branch 'origin/IB/CMSSW_6_2_X/stable' into IB/CMSSW_7_0_X/stable