0.6.8.9:

0.6.8.9:
	tweaked DEFCONSTANTs to be more ANSI-compliant (as required
		when building using an XC host incorporating changes
		from the previous commit) and generally cleaner
        got rid of DEFCONSTANT WRAPPER-LAYOUT completely, which was
		used only by STRUCTURE-WRAPPER, which is now gone
	added SB-INT:DEFCONSTANT-EQX to help ANSIfy DEFCONSTANTs
	merged several small files into primordial-extensions.lisp
	converted DEFMACRO DEFCONSTANT to use EVAL-WHEN instead of
		IR1 magic, in order to make it ANSI enough for
		DEFCONSTANT-EQX to work
	removed various nested EVAL-WHENs (to help cross-compiler)
	identified bug IR1-3, added workaround in DO-EVAL-WHEN-STUFF
	incremented fasl file version (because of mismatch between
		old IR1 magic %DEFCONSTANT/%%DEFCONSTANT behavior and
		new EVAL-WHEN %DEFCONSTANT behavior)
	deleted some unused code
	fixed (DEFCONSTANT X 1) (DEFVAR X) (SETF X 2) bug