Support -alh and -ald for DWARF 1:

	Support -alh and -ald for DWARF 1:
	* listing.c (struct list_info_struct): Add debugging field.
	(listing_newline): Initialize the debugging field.  If ELF, if the
	section starts with .debug or .line, set the debugging field in
	the listing structure.
	(debugging_pseudo): Add list parameter.  Change all callers.  If
	the debugging field is set, consider it to be a debugging pseudo.
	If ELF, skip blank lines between debugging lines.
	* read.c (emit_expr): If ELF, look for line numbers.
	(stringer): If ELF, look for file names.
PR 13210.