Update build-tools to ab/4522980 am: bccf557e34 am: 34155571c0
am: b71781fa11

Change-Id: I1880487d843e11b58c9cd7962c0128d2c38c7152
tree: c99cced8553aba90889e24522b797e6d3e007a7e
  1. common/
  2. darwin-x86/
  3. linux-x86/
  4. build-prebuilts.sh
  5. manifest.xml
  6. OWNERS