[es6] implement Reflect.apply() & Reflect.construct()

src/harmony-reflect.js

+// Copyright 2013 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.
+
+'use strict';
+
+var $Reflect = global.Reflect;
+
+function SetUpReflect() {
+  %CheckIsBootstrapping();
+
+  InstallFunctions($Reflect, DONT_ENUM, $Array(
+   "apply", ReflectApply,
+   "construct", ReflectConstruct
+  ));
+}
+
+SetUpReflect();