xorrisofs needs to use iso-level 3 when creating images with large
files. This adds tests to all the relevant templates, just like we used
to do for udf and mkisofs.
This enables Baytrail and similar atom CPUs that typically ship with a
32-bit firmware, but have a 64-bit capable CPU.
Signed-off-by: Peter Jones <pjones@redhat.com>
