futility: updater: add new quirk 'extra_retries'

In early bring up, some devices may have problem when flashrom is
reading or writing to the system flash. To unblock dogfood process,
we want to have a special quirk to retry flashing.

BUG=b:213706510
TEST=make; build and run test
BRANCH=None

Change-Id: I58788f620fb32f7c886d1e5638f4a3605ea77953
Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/3452846
Reviewed-by: YH Lin <yueherngl@chromium.org>
Commit-Queue: YH Lin <yueherngl@chromium.org>
Reviewed-by: Yu-Ping Wu <yupingso@chromium.org>
(cherry picked from commit 707b839fadfd600af4300bc451946f8e8ccf840e)
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/3906634
Commit-Queue: Nick Vaccaro <nvaccaro@google.com>
Tested-by: Nick Vaccaro <nvaccaro@google.com>