re PR c++/9162 ([New parser] Problem with default argument in a friend function)

re PR c++/9162 ([New parser] Problem with default argument in a friend function)

cp:
	PR c++/9162
	* decl.c (grokdeclarator): Return friend decls, not
	void_type_node.
	* decl2.c (grokfield): Alter friend decl check.
	* parser.c (struct cp_parser): Document default_arg chain on
	unparsed_functions_queue.
	(cp_parser_save_default_args): New.
	(cp_parser_init_declarator, cp_parser_function_definition,
	cp_parser_member_declaration): Call it.
	(cp_parser_class_specifier): Remove unused variable. Alter
	processing of unparsed_functions_queue.
testsuite:
	PR c++/9162
	* g++.dg/parse/defarg4.C: New.

From-SVN: r68886