Cherrypick upstream change to fix build.

This cherrypicks the following upstream change to fix build with the
latest Clang API:

34a4932e42b7cc853eff38a43ee009a8d101f488 chore: update LLVM (#5483)

Test: presubmit
Bug: 264965700
Change-Id: Id1bc47a52214708784150a9cc4a326e41aa87582
8 files changed