* objdump.c (with_source_code): New global variable.

	* objdump.c (with_source_code): New global variable.
	(usage): Mention -S/--source.
	(long_options): Add --source.
	(prev_functionname, prev_line): New static variables.
	(struct print_file_list): Define.
	(print_files): New static variable.
	(skip_to_line, show_line): New static functions.
	(disassemble_data): Call show_line to handle -l and -S.
	(main): Handle -S.
	* binutils.texi, objdump.1: Document -S/--source.