gooftool: change postinst param for new cros_installer.

--noupdate_firmware is not available and IS_FACTORY_INSTALL=1 is the better way
to stop firmware updating.

BUG=chrome-os-partner:8396
TEST=./gft_verify_rootfs.sh # pass, not seeing firmware updates.

Change-Id: I6d4a73850c41404cdc1a54fb8d36fa361a6273c0
Reviewed-on: https://gerrit.chromium.org/gerrit/17826
Reviewed-by: Tammo Spalink <tammo@chromium.org>
Commit-Ready: Hung-Te Lin <hungte@chromium.org>
Tested-by: Hung-Te Lin <hungte@chromium.org>
1 file changed