Use ccache also on osx and clang (#193)
Use ccache also on osx and clang (#193)

From https://github.com/robotology/yarp/commit/0316541bd27ada90b396cd53d37d9ca68c8fe17d#comments
robotology/idyntree,robotology/idyntree,robotology/idyntree,robotology/idyntree,robotology/idyntree