Update clang-tools to ab/6137988
am: d9fe13dddc

Change-Id: Ibfb468ca12a8b86759f1116ecfe95c2b5f73085d
tree: 6487cb699dce5fb1f9f35c4b30f3be55224d9be4
  1. darwin-x86/
  2. linux-x86/
  3. build-prebuilts.sh
  4. manifest.xml