0.8.13.35:

0.8.13.35:
	* SB!VM:WORD-LOGICAL-FOO transforms were being defined per-backend,
	  when in reality they can be shared.  Make it so.
	* The `length' slot in SB!VM:PRIM-SLOT-OBJECT wasn't being used;
	  delete it, but retain the :LENGTH option in
	  SB!VM:DEFINE-PRIMITIVE-OBJECT, because that *is* being used.
	  (mostly to generate offsets for GENESIS header files)