DR 1030 PR c++/51253

DR 1030 PR c++/51253

	DR 1030
	PR c++/51253
	* cp-tree.h (CALL_EXPR_LIST_INIT_P): New.
	* call.c (struct z_candidate): Add flags field.
	(add_candidate): Add flags parm.
	(add_function_candidate, add_conv_candidate, build_builtin_candidate)
	(add_template_candidate_real): Pass it.
	(build_over_call): Set CALL_EXPR_LIST_INIT_P.
	* tree.c (build_aggr_init_expr): Copy it.
	* semantics.c (simplify_aggr_init_expr): Preevaluate args if it's set.

From-SVN: r209309