[clang] [clang] Generate appropriate assume in presence of libc's memcpy (PR #119704)

[via cfe-commits]

serge-sans-paille wrote:

My original motivation was a colleague pointing me at https://godbolt.org/z/cPdx6v13r which was specific to gcc but an interesting situation and I wanted clang to be on-par with GCC on that behavior.

https://github.com/llvm/llvm-project/pull/119704