Update prebuilt Clang to r510928 (18.0.0). am: 878f994050 am: 7d24122e8c am: 0eeee72b96

Original change: https://android-review.googlesource.com/c/platform/prebuilts/clang/host/darwin-x86/+/2871685

Change-Id: I47b72cbfdf109fbbaae2118d96a86266ac16321f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>