Update build-tools to ab/4836637
am: 4ed15bb7d1

Change-Id: I29660cdc07dd2d0029d0725f86924edd3f745752
tree: 8031770efd2d9e6b9c045fd31adb06feec943e0d
  1. common/
  2. darwin-x86/
  3. linux-x86/
  4. build-prebuilts.sh
  5. manifest.xml
  6. OWNERS