Fix legacy const for-of/in destructuring

test/mjsunit/harmony/destructuring.js

Index: test/mjsunit/harmony/destructuring.js
diff --git a/test/mjsunit/harmony/destructuring.js b/test/mjsunit/harmony/destructuring.js
index 8287220965b3ba78f6b46b0aa4dc0136d8559c57..904058618ad23cb5520bba639a8fb14615b2c5ca 100644
--- a/test/mjsunit/harmony/destructuring.js
+++ b/test/mjsunit/harmony/destructuring.js
@@ -1097,3 +1097,9 @@
   assertThrows(
     function(){ eval("(class{foo(a, {}) {'use strict';}});") }, SyntaxError);
 })();
+
+(function TestLegacyConstDestructuringInForLoop() {
+  var result;
+  for (const {foo} of [{foo: 1}]) { result = foo; }
+  assertEquals(1, result);
+})();