[clang] [clang]: support std::meta::info for primitive types (PR #190356)

[Avi Kivity via cfe-commits]

avikivity wrote:

Will this work with libstdc++v3? I saw that libstdc++ defines std::meta::info as decltype(^^::), so I expect it will.

https://github.com/llvm/llvm-project/pull/190356