0.7.10.6:

0.7.10.6:
	embarrassment reduction: transformed ugly duplicate
		DEF-BOOLEAN-ATTRIBUTE into ugly OAOO (and also renamed
		it to !DEF-BOOLEAN-ATTRIBUTE, since not aspiring to
		make it exist on the target seemed to make it easier
		to think about)
	Also, as long as I'm renaming it anyway, it has no special
		connection to the compiler and is used in SB!ASSEM too,
		I moved !DEF-BOOLEAN-ATTRIBUTE from SB!C to SB!INT.