[es6] ship Object.assign

test/webkit/fast/js/Object-getOwnPropertyNames.js

Index: test/webkit/fast/js/Object-getOwnPropertyNames.js
diff --git a/test/webkit/fast/js/Object-getOwnPropertyNames.js b/test/webkit/fast/js/Object-getOwnPropertyNames.js
index 20e509ba96960bfa1cb6d5d1f102cca77507a70a..c7c0bbd12eb79320736fc5302a9d50a925edc67c 100644
--- a/test/webkit/fast/js/Object-getOwnPropertyNames.js
+++ b/test/webkit/fast/js/Object-getOwnPropertyNames.js
@@ -71,7 +71,7 @@ var expectedPropertyNamesSet = {
     "encodeURI": "['length', 'name']",
     "encodeURIComponent": "['length', 'name']",
 // Built-in ECMA objects
-    "Object": "['arguments', 'caller', 'create', 'defineProperties', 'defineProperty', 'deliverChangeRecords', 'freeze', 'getNotifier', 'getOwnPropertyDescriptor', 'getOwnPropertyNames', 'getOwnPropertySymbols', 'getPrototypeOf', 'is', 'isExtensible', 'isFrozen', 'isSealed', 'keys', 'length', 'name', 'observe', 'preventExtensions', 'prototype', 'seal', 'setPrototypeOf', 'unobserve']",
+    "Object": "['arguments', 'assign', 'caller', 'create', 'defineProperties', 'defineProperty', 'deliverChangeRecords', 'freeze', 'getNotifier', 'getOwnPropertyDescriptor', 'getOwnPropertyNames', 'getOwnPropertySymbols', 'getPrototypeOf', 'is', 'isExtensible', 'isFrozen', 'isSealed', 'keys', 'length', 'name', 'observe', 'preventExtensions', 'prototype', 'seal', 'setPrototypeOf', 'unobserve']",
     "Object.prototype": "['__defineGetter__', '__defineSetter__', '__lookupGetter__', '__lookupSetter__', '__proto__', 'constructor', 'hasOwnProperty', 'isPrototypeOf', 'propertyIsEnumerable', 'toLocaleString', 'toString', 'valueOf']",
     "Function": "['arguments', 'caller', 'length', 'name', 'prototype']",
     "Function.prototype": "['apply', 'arguments', 'bind', 'call', 'caller', 'constructor', 'length', 'name', 'toString']",