* Makefile.in, Makefile.dos, generic.em, genscripts.sh,

	* Makefile.in, Makefile.dos, generic.em, genscripts.sh,
	gld960.em, h8300hms.em, h8300xray.em, lnk960.em, st2000.em,
	vanilla.em:  Rename all (generated) ld__*.c files to em_.c.
	This is one character shorter, and lets people build on
	SVR3 system. (ld__h8300xray.[co] was the killer there;
	h8300xray.sc-sh is also overlong, but seems harmless.)
	Based on a patch from Jonathan Ryshpan <hitachi!amito!jon>.
	* Makefile.in (clean):  Fix typo mostclean -> mostlyclean.
	* configure.in:  Add host isc.