[libc-commits] [libc] [libc] Pull last dependencies into rpc_util.h (PR #116693)

[Joseph Huber via libc-commits]

jhuber6 wrote:

Changes in last commit, will squash once https://github.com/llvm/llvm-project/pull/116454 lands.

https://github.com/llvm/llvm-project/pull/116693