ryu: Add support to flash firmware using fastboot

BUG=chrome-os-partner:35861
BRANCH=None
TEST=Compiles successfully and fastboot flash firmware works fine.

Change-Id: I0a4742f41400118f0a087410a7cbcc0e11f7adf1
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://chromium-review.googlesource.com/250948
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Commit-Queue: Furquan Shaikh <furquan@chromium.org>
Tested-by: Furquan Shaikh <furquan@chromium.org>
Trybot-Ready: Furquan Shaikh <furquan@chromium.org>
3 files changed