[automerger skipped] Update clang-tools to ab/6319416 am: 7e2cfe9cd1 -s ours am: a19723e786 -s ours

am skip reason: Change-Id Idbefc839be1f67ad8a5b759914ce57134b496636 with SHA-1 7e2cfe9cd1 is in history

Change-Id: I0f423503d390b87e3c5a73f40565bf403752c4a4
tree: 1e68c86d94496efad54c59e1407fd110777cab26
  1. darwin-x86/
  2. linux-x86/
  3. build-prebuilts.sh
  4. manifest.xml