[clang] [Sema][Clang] Error on 'auto' storage class in C++11 (PR #167162)

[Younan Zhang via cfe-commits]

https://github.com/zyn0217 requested changes to this pull request.

This is https://github.com/llvm/llvm-project/pull/166004

https://github.com/llvm/llvm-project/pull/167162