[libc-commits] [libc] [libc] add various macros relate to *ADDR* (PR #164830)

[Michael Jones via libc-commits]

https://github.com/michaelrj-google commented:

This looks good, and I agree that tests aren't necessary. You do need to add `in_addr_t.h` to the dependencies in cmake though.

https://github.com/llvm/llvm-project/pull/164830