futility: Allow --force to override min_platform_version quirk

BUG=b:162747154
BRANCH=none
TEST=verify that update runs for rev1, but not rev0 without --force
TEST=verify that update runs for both rev1 and rev0 with --force

Signed-off-by: Bob Moragues <moragues@chromium.org>
Change-Id: I1594d6a4c83d8a0c13494f8f108225618612db8e
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/2360590
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Commit-Queue: Hung-Te Lin <hungte@chromium.org>