Update prebuilt Clang to r416183b1 (12.0.7). am: 4cb71d845c

Original change: https://googleplex-android-review.googlesource.com/c/platform/prebuilts/clang/host/darwin-x86/+/15100580

Change-Id: I7cc609aa6f4d123ce9efa39c715d67ee8bba425a