Fix a Mac-ism and add a rule to regress hardware

Sudoko doesn't run on hardware, so keep it out for the moment

Add toplevel shortcut to hardware regressions
Skip the GC output and drop the initial CRLF
Widened the atom to 18-bits, while keeping pointers 14-bit

Eventually the the Number === HeapAddr assumption may be restored and
HeapAddr itself will be decomposed into
(HeapAddrTag,HeapAddrCacheIndex) or similar.