Update clang-tools to ab/5988434 am: c7afec7d17
am: ef9135150a

Change-Id: I4fca9b81c9b42da8f1476332d6d2921bc70932ca
tree: 636a5ed2473639b9ff052e1a7e75fb70ecaa20bb
  1. darwin-x86/
  2. linux-x86/
  3. build-prebuilts.sh
  4. manifest.xml