cling travis: CMake and travis are uncooperative, cannot use ccache with clang:
cling travis: CMake and travis are uncooperative, cannot use ccache with clang:

COMPILER="ccache clang" gets lost in CMake; using ccache does not work as there is no ccache-wrapper for clang-3.9.
So just use clang-3.9 without ccache.

root-mirror/cling,root-mirror/cling,karies/cling,root-mirror/cling,karies/cling,root-mirror/cling,karies/cling,karies/cling,karies/cling,root-mirror/cling,karies/cling,root-mirror/cling