Ship ES2015 iterator finalization

test/mjsunit/harmony/regress/regress-4658.js

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flags: --harmony-do-expressions
+// Flags: --harmony-do-expressions --noharmony-iterator-close
 
 (function testWithSimpleLoopVariable() {
   var f = (x, y = (do { var s=0; for (var e of x) s += e; s; })) => y*(y+1);
   var result = f([1,2,3]);  // core dump here, if not fixed.
   assertEquals(result, 42);
 })();
 
 (function testWithComplexLoopVariable() {
   var f = (x, i=x[0]-1, a=[],
            y = (do { var s=0;
                      for (a[i] of x) s += a[i++];
                      s;
                    })) => y*(a[0]+a[1]*a[2]);
   var result = f([1,2,3]);  // core dump here, if not fixed.
   assertEquals(result, 42);
 })();