[libc-commits] [libc] [libc] Add "include/" to the LLVM include directories (PR #83199)

[Nick Desaulniers via libc-commits]

https://github.com/nickdesaulniers approved this pull request.

Assuming the result builds (please wait for presubmit results), this looks like a nice cleanup! Thanks! :clap: :juggling_person: 

https://github.com/llvm/llvm-project/pull/83199