[libc-commits] [libc] [libc] Stop installing `sys/types.h` when not requested (PR #119765)

[Nick Desaulniers via libc-commits]

nickdesaulniers wrote:

Right, the headers are only generated for fullbuild. The proxy headers fall back to sys/types.h when in overlay mode. LGTM

https://github.com/llvm/llvm-project/pull/119765