Update build-tools to ab/4822804 am: fb39e2208c
am: 5fb5e748d3

Change-Id: I1ae5601e54788e507faed9169e134577f7ce443c
tree: ef35ba77f853d608696a66d42c42a8e76459cb68
  1. common/
  2. darwin-x86/
  3. linux-x86/
  4. build-prebuilts.sh
  5. manifest.xml
  6. OWNERS