0.7.5.7:

0.7.5.7:
	deleted call_cmd() from ldb, since it's bitrotted
	deleted *!INITIAL-FDEFN-OBJECTS* from static symbols now that
		the C runtime doesn't need it
	incremented fasl file version number now that static symbols
		have changed
	deleted unused *INTERNAL-GC-TRIGGER*
	s/INTERNAL_GC_TRIGGER/GENCGC/ (so that all the runtime code
		which compiled differently depending on cpp's knowledge
		of the existence of the unused variable now depends on
		something somewhat more relevant)