re PR c++/51253 ([C++11][DR 1030] Evaluation order (sequenced-before relation) among initializer-clauses in braced-init-list)

	PR c++/51253
	PR c++/61382
gcc/
	* gimplify.c (gimplify_arg): Non-static.
	* gimplify.h: Declare it.
gcc/cp/
	* cp-gimplify.c (cp_gimplify_expr): Handle CALL_EXPR_LIST_INIT_P here.
	* semantics.c (simplify_aggr_init_expr): Not here, just copy it.

From-SVN: r211235