update_payload: Regenerate protobuf to include IMGDIFF.

Generated from update_metadata.proto using protoc 2.5.0

BUG=b:26456666
TEST=./checker_unittest.py

Change-Id: I9dc7db00be8afb2f78e80bec910f9ca83a55a9a1
Reviewed-on: https://chromium-review.googlesource.com/329237
Commit-Ready: Sen Jiang <senj@chromium.org>
Tested-by: Sen Jiang <senj@chromium.org>
Reviewed-by: Alex Deymo <deymo@chromium.org>
3 files changed
tree: 6a8c372ae4128b2e20c06136bdc32464b93835d1
  1. scripts/