[libc-commits] [libc] [libc][termios] Fix termios compatibility with glibc 2.42 or after. (PR #211039)

[Jeff Bailey via libc-commits]

https://github.com/kaladron approved this pull request.

Thanks for doing the rounds on this with me!  One minor whitespace nit within.  Also, I think the primary feature of this PR is that it makes our builds hermetic and not rely on system termios.h.  As a nice side effect, it also supports 2.42 in overlay mode.

https://github.com/llvm/llvm-project/pull/211039