[Bug target/80881] Implement Windows native TLS

[tanksherman27 at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80881

--- Comment #100 from Julian Waters <tanksherman27 at gmail dot com> ---
Great! This means it should be able to compile on MSYS2 now. Ready for
integration?