Add merge-abi-diff to merge abi diff reports.
am: ce1c0735e1

Change-Id: I60ebe6813b6d6898cd926a6c3592e7022652b342
tree: 9145308746f31a5cbcc9e8b13e8a681647dd0460
  1. darwin-x86/
  2. linux-x86/
  3. build-prebuilts.sh
  4. manifest.xml