Fix bug in cling's diagnostic engine, if CUDA mode is enable
Fix bug in cling's diagnostic engine, if CUDA mode is enable

- solves the bug, that error messages of the device compiler was
not prefixed with "cling-ptx"

olifre/root,root-mirror/root,root-mirror/root,root-mirror/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,root-mirror/root,root-mirror/root,olifre/root,olifre/root,root-mirror/root,root-mirror/root,olifre/root,olifre/root,root-mirror/root,root-mirror/root,root-mirror/root,root-mirror/root,olifre/root