[llvm] Add raw_socket_stream (PR #73603)

[Michael Spencer via llvm-commits]

https://github.com/Bigcheese requested changes to this pull request.

Thanks for the patch. As a high level comment you should include a bit more information in the commit message.

Also the llvm/lib/Support/CMakeLists.txt file needs to change line 44 to:
`set(system_libs ${system_libs} psapi shell32 ole32 uuid advapi32 Ws2_32)`

This links against the winsock library.

https://github.com/llvm/llvm-project/pull/73603