Update build-tools to ab/4522980 am: bccf557e34
am: 34155571c0

Change-Id: I6b74b9b6c985e7b7adec29fd77ca81a4afc4d9b3
tree: c99cced8553aba90889e24522b797e6d3e007a7e
  1. common/
  2. darwin-x86/
  3. linux-x86/
  4. build-prebuilts.sh
  5. manifest.xml
  6. OWNERS