re PR c++/54277 (Template class member referred to with implicit this inside lambda is incorrectly const-qualified)

	PR c++/54277
	* cp-tree.h (WILDCARD_TYPE_P): Split out from...
	(MAYBE_CLASS_TYPE_P): ...here.
	* semantics.c (lambda_capture_field_type): Only build a
	magic decltype for wildcard types.
	(lambda_proxy_type): Likewise.
	(finish_non_static_data_member): Get the quals from
	the object.

From-SVN: r196747