image_signing: sign_official_build.sh: switch initial image signing to loopbacks
This changes the kernel config reading and the stateful vblock updating
to use loopback devices. This avoids having to copy out the kernels
many times over just to read them.
BRANCH=None
BUG=chromium:714598
TEST=signing images still works
Change-Id: Ibb49791a7db998e45b35ed15ddc12126e669c730
Reviewed-on: https://chromium-review.googlesource.com/505477
Commit-Ready: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: David Riley <davidriley@chromium.org>
Reviewed-by: Jorge Lucangeli Obes <jorgelo@chromium.org>
1 file changed
