sign_official_build: disable gsetup for reven

More permanent fix todo, need to unblock reven-release.

BUG=b:199136347
TEST=shellcheck
BRANCH=none

Change-Id: I2b124f88aa2c5c70124888e2d64bd5a2c41f1a96
Signed-off-by: Jack Neus <jackneus@google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/3149594
Reviewed-by: George Engelbrecht <engeg@google.com>
1 file changed