PR c++/41305, DR 384
	* name-lookup.c (arg_assoc_class): Split out arg_assoc_class_only
	and arg_assoc_bases.
	(friend_of_associated_class_p): Remove.
	(arg_assoc_namespace): Don't call it.
	(arg_assoc_template_arg): Use arg_assoc_class_only for member
	template context.
	(arg_assoc_type): Handle UNION_TYPE and ENUMERAL_TYPE properly.

	* name-lookup.c (arg_assoc): Handle TEMPLATE_ID_EXPR properly.

From-SVN: r155461