Merge "Combine checksum of all boot images." am: 9863b6c am: 6c24b6a  -s ours
am: e9b5a45

* commit 'e9b5a45e058d3a4ba79d7d49404cfdd7d03aade9':
  Combine checksum of all boot images.

Change-Id: I3e10dd98abccd718df84302df49a7e0516ab48e5