Update build-tools to ab/4140685 am: 66cc0d305e  -s ours
am: 703584fddd  -s ours

Change-Id: I858106141507b89b6487b37c1b22404b6f81e51d
tree: 8a8d0d60d85ec4786a5f4a220085c6e9d84c0a20
  1. darwin-x86/
  2. linux-x86/
  3. build-prebuilts.sh
  4. manifest.xml
  5. OWNERS