Reduce extra char -> llvm::StringRef conversions.
Reduce extra char -> llvm::StringRef conversions.

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