Update clang-tools to ab/7423447 am: 986b880a12 am: d0a267c831

Original change: https://android-review.googlesource.com/c/platform/prebuilts/clang-tools/+/1727250

Change-Id: I54d5ef1b0215a1749dfe8ea942de8e059dad27a2
tree: b4dd1d51ec27fa6aab5f6a429e9170e9a43a698e
  1. darwin-x86/
  2. linux-x86/
  3. build-prebuilts.sh
  4. manifest.xml