Update clang-tools to ab/6339306 am: 881a528030 am: beac094e48 am: 73d74fe11d am: e98e1e6601

Change-Id: I8074235cdefb643ac352b882528a99297d056d2d
tree: a8aff0a81539d1d71c161f5e4fafd6daf08aa206
  1. darwin-x86/
  2. linux-x86/
  3. build-prebuilts.sh
  4. manifest.xml