[automerger skipped] Update clang-tools to ab/4809351 am: 186a9d1adf am: 4aa582b4c1  -s ours
am: be0e3c61be  -s ours

Change-Id: I45c0b50d8d169cbb6608a43514946f305b07b8c6
tree: 7f1a2853cc94de56218c4401d7a5f547d959f167
  1. darwin-x86/
  2. linux-x86/
  3. build-prebuilts.sh
  4. manifest.xml