[libc-commits] [libc] [libc] add headers.txt for windows (PR #118675)

[Paul Kirth via libc-commits]

ilovepi wrote:

I also kicked off https://ci.chromium.org/ui/p/fuchsia/builders/toolchain.ci.shadow/clang-windows-x64/b8729459123378281649/overview with this patch.

https://github.com/llvm/llvm-project/pull/118675