The functions are shared between build_image and mod_image_for_test.sh.
BUG=None
TEST=build_image
Change-Id: Ib6d860a6818abee380dde97460f57943cc0a070c
Reviewed-on: http://gerrit.chromium.org/gerrit/6444
Reviewed-by: Richard Barnette <jrbarnette@chromium.org>
Tested-by: Richard Barnette <jrbarnette@chromium.org>