invoke.texi (-fdump-unnumbered): Update docs when line number notes are gone.

invoke.texi (-fdump-unnumbered): Update docs when line number notes are gone.

	* doc/invoke.texi (-fdump-unnumbered): Update docs when line number
	notes are gone.
	* print-rtl.c (flag_dump_unnumbered): Update comments.
	(print_rtl): Fix my previous change.
	* emit-rtl.c (emit_note_before, emit_note_after): Clear out note
	specific data.

From-SVN: r125026