PR c++/91673 - ICE with noexcept in alias-declaration.

PR c++/91673 - ICE with noexcept in alias-declaration.

	* parser.c (CP_PARSER_FLAGS_DELAY_NOEXCEPT): New parser flag.
	(cp_parser_lambda_declarator_opt): Pass CP_PARSER_FLAGS_NONE to
	cp_parser_exception_specification_opt.
	(cp_parser_direct_declarator): Adjust a call to
	cp_parser_exception_specification_opt.
	(cp_parser_member_declaration): Pass CP_PARSER_FLAGS_DELAY_NOEXCEPT
	to cp_parser_declarator if not processing a friend or typedef
	declaration.
	(cp_parser_late_noexcept_specifier): Adjust a call to
	cp_parser_noexcept_specification_opt.
	(cp_parser_noexcept_specification_opt): New parameter for parser flags,
	drop the FRIEND_P parameter.  Use the new parameter.
	(cp_parser_exception_specification_opt): Likewise.
	(cp_parser_transaction): Adjust a call to
	cp_parser_noexcept_specification_opt.
	(cp_parser_transaction_expression): Likewise.

	* g++.dg/cpp1z/using7.C: New test.
	* g++.dg/cpp1z/using8.C: New test.

From-SVN: r275617