0.8.3.45.modular2:

0.8.3.45.modular2:
	Restore buildability on x86
	... define essentially the same source transforms as were
		deleted to make the PPC version efficient.
	... KLUDGE: the full call version of LOGEQV is now inefficient;
		first the arguments get associated into logeqv pairs;
		then (LOGNOT (LOGXOR .. ..)) is done on each pair.
		Since user code gets transformed to efficiency, this
		isn't so bad... only (funcall #'logeqv .. .. ..)
		exhibits this problem.