tree 2188e06f226b7ff07c3aacd8c181c85e256a6f66
parent dc8092521b50b108607ed54afde94d20a22468df
author Jeff Hao <jeffhao@google.com> 1460068854 -0700
committer Jeff Hao <jeffhao@google.com> 1460083909 -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

(cherry-picked from commit 4f351aae00f43dd4e3290976f249d3664cc47091)

Change-Id: Ia557e2460ca582082368ef93508c04ce32c3036a