[automerger skipped] Update clang-tools to ab/4713679 am: 2c88704f24  -s ours
am: 439ad1d6a4  -s ours

Change-Id: I73887110f8c7f94490fbf56e114f1c72e0927fe8
tree: e1721b23bfa4b6dd9b3b5d09164afd2497aed5df
  1. darwin-x86/
  2. linux-x86/
  3. build-prebuilts.sh
  4. manifest.xml