Fix issues with name and length on poison pill function

test/mjsunit/es6/throw-type-error-function-restrictions.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.
+
+var throwTypeErrorFunction =
+    Object.getOwnPropertyDescriptor(Function.prototype, 'arguments').get;
+
+assertFalse(
+    Object.prototype.hasOwnProperty.call(throwTypeErrorFunction, 'name'));
+assertThrows(function() {
+  'use strict';
+  throwTypeErrorFunction.name = 'foo';
+}, TypeError);
+
+var lengthDesc =
+    Object.getOwnPropertyDescriptor(throwTypeErrorFunction, 'length');
+assertFalse(lengthDesc.configurable, 'configurable');
+assertFalse(lengthDesc.enumerable, 'enumerable');
+assertFalse(lengthDesc.writable, 'writable');
+assertThrows(function() {
+  'use strict';
+  throwTypeErrorFunction.length = 42;
+}, TypeError);
+
+assertTrue(Object.isFrozen(throwTypeErrorFunction));