[automerger skipped] Update clang-tools to ab/6339306 am: bca5d20b3a -s ours am: 4ad0733d36 -s ours am: fca6ad9860 -s ours

am skip reason: Change-Id I9eca1155589a5d532af7f198b823e297dff71786 with SHA-1 bca5d20b3a is in history

Change-Id: Icabb9a597a763f36eabe87e8c9b18a9c28a2ad0f
tree: a8aff0a81539d1d71c161f5e4fafd6daf08aa206
  1. darwin-x86/
  2. linux-x86/
  3. build-prebuilts.sh
  4. manifest.xml