Wed Jan 8 11:26:40 1992 Steve Chamberlain (sac at rtl.cygnus.com)

Wed Jan  8 11:26:40 1992  Steve Chamberlain  (sac at rtl.cygnus.com)
        Added support for listings
	* Makefile.in: include listing.[co]
	* as.c: parse -l
	* as.h: include listing.h, include listing hook into frag
	* frags.c (frag_new): hook for creating line number info
	* messages.c (as_warn, as_bad): remember message for listing
	* read.c: add new pseudos to the table
	* write.c: (relax_segment): need to cope with branches with 0
	offsets, so create M68K_AIM_KLUDGE- this came to light because
	listings make lots of zero length frags.
	* listing.c, listing.h: new files