re PR c++/61566 (ICE in write_unscoped_name)

re PR c++/61566 (ICE in write_unscoped_name)

	PR c++/61566
	* pt.c (instantiate_class_template_1): Ignore lambda on
	CLASSTYPE_DECL_LIST.
	(push_template_decl_real): A lambda is not primary.
	(lookup_template_class_1): Don't look for a lambda partial
	instantiation.
	* lambda.c (maybe_add_lambda_conv_op): Distinguish between being
	currently in a function and the lambda living in a function.
	* mangle.c (CLASSTYPE_TEMPLATE_ID_P): False for lambda.

From-SVN: r214046