[lld] [lldb] [clang-tools-extra] [clang] [libcxx] [libc] [flang] [llvm] [compiler-rt] [NVPTX] Add support for -march=native in standalone NVPTX (PR #79373)

[Artem Belevich via cfe-commits]

https://github.com/Artem-B approved this pull request.

LGTM, as we can only handle a single GPU target during compilation.


https://github.com/llvm/llvm-project/pull/79373