tree cb1b91d3e5cc075177c886c1145bb0294caad691
parent 08305325d3468d5ef413eb0b36b1ea1b3746a6c4
author Jeff Hao <jeffhao@google.com> 1460068854 -0700
committer Jeff Hao <jeffhao@google.com> 1460075605 -0700

Combine checksum of all boot images.

Allows a change to be detected in more than just the first image.
Combines checksums of all boot images using xor. A better hash is left
as TODO.

Bug: 28054110
Change-Id: Ifbdd6cbb0104c95e8926ba4f8a207cc72dbb7f79