Update build-tools to ab/4522980
am: bccf557e34

Change-Id: Ic8013858984b5cc0b6929c633967822fedafe6af
tree: c99cced8553aba90889e24522b797e6d3e007a7e
  1. common/
  2. darwin-x86/
  3. linux-x86/
  4. build-prebuilts.sh
  5. manifest.xml
  6. OWNERS