3f284c0927
Newer versions of llvm/clang mean there is both an
llvm::StringLiteral and a clang::StringLiteral. Since we're
dumping both namespaces wholesale into the global namespace with
`using` declarations, this creates a name collision, which must be
resolved.
This change is backwards-compatible, and fixes a problem you
encounter when using newer versions of the llvm/clang API.
[ROCm/clr commit: 73984ed809]