Add ebuild for adding disk firmware upgrade script

CQ-DEPEND=CL:185261
BUG=chromium:328624
TEST=emerge-falco chromeos-base/disk_updater
TEST="FEATURES=test emerge-falco -v chromeos-base/disk_updater"
TEST=Build Falco image, test firmware update/downgrade.

Change-Id: I9f22af80a55bbaaec3e8db862f3b130fcf16cd51
Reviewed-on: https://chromium-review.googlesource.com/180633
Reviewed-by: Gwendal Grignou <gwendal@chromium.org>
Commit-Queue: Gwendal Grignou <gwendal@chromium.org>
Tested-by: Gwendal Grignou <gwendal@chromium.org>
(cherry picked from commit 8c62fc2898c2dc799745a8e07cee691953002af8)
Reviewed-on: https://chromium-review.googlesource.com/185249
Reviewed-by: Matthew Yuan <matthewyuan@chromium.org>
1 file changed