Revert "cros_generate_update_payload: Use loopbacks instead of copying partitions."

This reverts commit 4fb1971bca53f5bd9bf196b28939f85a792c5b4e.

Change-Id: Ibcda278042643f140ed32ad52142354b2e3fd82b
Reviewed-on: https://chromium-review.googlesource.com/224201
Reviewed-by: Gabe Black <gabeblack@chromium.org>
Commit-Queue: Gabe Black <gabeblack@chromium.org>
Tested-by: Gabe Black <gabeblack@chromium.org>
1 file changed