Combine checksum of all boot images. am: 4f351aa
am: 54d78b6

* commit '54d78b66f5a614fd85d89008e17ec9e3c65e2f46':
  Combine checksum of all boot images.

Change-Id: Ie3696c5e16fcb9fb0b6864a40a0d5b42ee33c35e