Update clang-tools to ab/4612694 am: 2bab765959
am: 298dbcbce9

Change-Id: I2f3e7234d03dab66ccbda5ae9b510dd2324e2e30
tree: caca163d9cc57a570186cfa9ce52f13014c02de2
  1. darwin-x86/
  2. linux-x86/
  3. build-prebuilts.sh
  4. manifest.xml