Update build-tools to ab/5405896
am: 63e52c8879

Change-Id: I3b94bbf8c47d993c20a86c0a71cebc5e41d386fd
tree: 0aa736a0cf6971d619328d6231998c01fe70147a
  1. common/
  2. darwin-x86/
  3. linux-x86/
  4. path/
  5. build-prebuilts.sh
  6. manifest.xml
  7. OWNERS