futility: updater: disable broken '--repack' argument
futility: updater: disable broken '--repack' argument

The `--repack` is actually broken if invoked from futility updater
because libzip does not support SFX, and can't open an empty file.
The right way to repack is to use the --repack from the wrapper script
(e.g., chromeos-firmwareupdate) that it will call zip directly.

BUG=b:236399204
TEST=make; test
BRANCH=none

Change-Id: I0a88bb9d9f16acb49029626da76e92e78fcd331d
Signed-off-by: Hung-Te Lin <8a7fce4940baad93a69f5073b383c85deed9d9c4@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/3721657
Reviewed-by: YH Lin <a608809fda0b3a5e5ffc78f5b79106a21e96e6dd@chromium.org>

coreboot/vboot,coreboot/vboot,coreboot/vboot,coreboot/vboot,coreboot/vboot