[PATCH] [libcxx] Remove static inline and make use of _LIBCPP_HIDE_FROM_ABI in __supp...

[PATCH] [libcxx] Remove static inline and make use of _LIBCPP_HIDE_FROM_ABI in __support headers

After feedback from D122861, do the same thing with some of the other headers. Try to move the
headers so they have a similar style and way of doing things.

+ also applies:
https://reviews.llvm.org/D141208

Reviewed By: ldionne, daltenty

Differential Revision: https://reviews.llvm.org/D124227

Gbp-Pq: Name libcxx-D124227-wasm.patch