Update the *.ok files to reflect the slightly larger
last partition the latest fdisk allows.

Spotted, fix tested and ok anton@

Reformating the test logging affected the expected output.

Update *.ok files to reflect recent modifications to
the auto allocation tables.

Split the disklabel regress into multiple tests. Move all code
into Makefile. Verbose testing and failing early helps debugging.
Remove the disk image during cleanup to save space.
OK krw@