add parsing for ObjC* method & method parm attributes

add parsing for ObjC* method & method parm attributes

gcc/cp:

	Partially merged from apple/trunk branch on FSF servers:
	2006-04-26 Fariborz Jahanian <fjahanian@apple.com>
	Radar 3803157 (method attributes)

	* parser.c (cp_parser_objc_method_keyword_params): Handle attributes.
	(cp_parser_objc_method_tail_params_opt): Likewise.
	(cp_parser_objc_method_signature): Likewise.
	(cp_parser_objc_method_maybe_bad_prefix_attributes): New.
	(cp_parser_objc_method_prototype_list): Handle attributes.
	(cp_parser_objc_method_definition_list): Likewise.

gcc/objc:

	* objc-act.c (objc_add_method_declaration): Handle attributes.
	(objc_start_method_definition): Likewise.
	(objc_generate_cxx_ctor_or_dtor): Pass NULL attributes to ctor/dtor.
	(objc_build_keyword_decl): Handle attributes.

gcc:

	* c-parser.c (c_parser_declaration_or_fndef): Diagnose incorrect prefix
	attributes on methods.
	 (c_parser_objc_method_definition): Handle attributes.
	(c_parser_objc_methodproto): Likewise.
	(c_parser_objc_maybe_method_attributes): New.
	(c_parser_objc_method_decl): Handle attributes, add a similar diagnostic
	to ObjC++ for a missing definition.

gcc/c-family:

	* c-common.h: Update declarations to include attributes.
	* stub-objc.c: Likewise.

testsuite:

	* objc.dg/attributes/method-attribute-1.m: New.
	* objc.dg/attributes/method-attribute-2.m: New.

	* obj-c++.dg/attributes/method-attribute-1.m: New.
	* obj-c++.dg/attributes/method-attribute-2.m: New.

From-SVN: r164702