cc: add C99 variadic macros
 [rsc] --rw-rw-r-- M 628694 rsc sys 1302 Apr 10 13:27 sys/src/cmd/cc/c99
	/n/sourcesdump/2006/0410/plan9/sys/src/cmd/cc/c99:14,19 - 
	/n/sourcesdump/2006/0411/plan9/sys/src/cmd/cc/c99:14,20
	  26. _Bool, float _Complex, double _Complex, long double _Complex
	  
	  Done:
	+ 7. __VA_ARGS__
	  11, 30, 31, 32. restrict, inline
	  12. Allow declarations anywhere.
	  15. for loop declarations
	/n/sourcesdump/2006/0410/plan9/sys/src/cmd/cc/c99:40,46 - 
	/n/sourcesdump/2006/0411/plan9/sys/src/cmd/cc/c99:41,46
	  4. __STDC_VERSION__
	  5. __STDC_IEC_559__, __STDC_IEC_559_COMPLEX__,
	  	__STDC_ISO_10646__
	- 7. __VA_ARGS__
	  13. Digraph tokens
	  23. __func__ identifier
	  
 [rsc] --rw-rw-r-- M 628694 glenda sys 12205 Apr 10 13:26 sys/src/cmd/cc/macbody
	[diffs elided - too long]
	[diff -c /n/sourcesdump/2006/0410/plan9/sys/src/cmd/cc/macbody /n/sourcesdump/2006/0411/plan9/sys/src/cmd/cc/macbody]