Update clang-tools to ab/6459482 am: 33d5dddf1c am: 441f03682c am: 1b8137b6ae

Change-Id: I09a4ab4f2c419ef852e9a506bba5a7ff8216108b
tree: f234c78f2d11442380658d4d16f03a87694110b1
  1. darwin-x86/
  2. linux-x86/
  3. build-prebuilts.sh
  4. manifest.xml