mach-o: display data_in_code.

binutils/
	* od-macho.c (OPT_DATA_IN_CODE): New macro.
	(options): Add entry for data in code.
	(mach_o_help): Ditto.
	(data_in_code_kind_name): New array.
	(dump_data_in_code): New function.
	(dump_load_command): Handle data in code.
	(mach_o_dump): Ditto.
	(dump_header): Display a terminal newline.