* dlltool.c (export_type): Add data field.

	* dlltool.c (export_type): Add data field.
	(def_exports): Add data parameter.  Change all callers.
	(dump_def_info): Print data field.
	(gen_def_file): Likewise.
	(make_one_lib_file): Handle data field by not emitting simple
	label and not emitting anything in SEC_TEXT.
	(dtab): Print data field.
	(process_duplicates): Merge data field.
	* dlltool.h (def_exports): Update declaration.
	* defparse.y (expline): Accept opt_DATA.  Pass it to def_exports.
	(opt_DATA): New non-terminal.