[es6] support `get` and `set` in shorthand properties

test/mjsunit/harmony/destructuring.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-destructuring --harmony-arrow-functions
 // Flags: --harmony-default-parameters --harmony-rest-parameters
 
 (function TestObjectLiteralPattern() {
-  var { x : x, y : y } = { x : 1, y : 2 };
+  var { x : x, y : y, get, set } = { x : 1, y : 2, get: 3, set: 4 };
   assertEquals(1, x);
   assertEquals(2, y);
+  assertEquals(3, get);
+  assertEquals(4, set);
 
   var {z} = { z : 3 };
   assertEquals(3, z);
 
 
   var sum = 0;
   for (var {z} = { z : 3 }; z != 0; z--) {
     sum += z;
   }
   assertEquals(6, sum);
@@ skipping 992 matching lines @@
   assertThrows(function(){ eval("({}) => {'use strict';}") }, SyntaxError);
   assertThrows(
     function(){ eval("(class{foo({}) {'use strict';}});") }, SyntaxError);
 
   assertThrows(
     function(){ eval("function(a, {}){'use strict';}") }, SyntaxError);
   assertThrows(function(){ eval("(a, {}) => {'use strict';}") }, SyntaxError);
   assertThrows(
     function(){ eval("(class{foo(a, {}) {'use strict';}});") }, SyntaxError);
 })();