Comment 32 for bug 1040557

From discussions with Michael earlier: shim task was opened to make sure bug was on release team radar, and hopes that either shim or grub may be able to participate in detection/mitigation. Issue some sort of "WARNING: don't do this, Ubuntu can't run on this firmware" if specific firmware identifier is detected, before UEFI progresses? If this is not the case, task should be marked as invalid.