Add paper-listbox to third_party/polymer

third_party/polymer/v1_0/components-chromium/paper-listbox/compiled_resources2.gyp

 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 #
 # NOTE: Created with generate_compiled_resources_gyp.py, please do not edit.
 {
   'targets': [
     {
-      'target_name': 'iron-validatable-behavior-extracted',
+      'target_name': 'paper-listbox-extracted',
       'dependencies': [
-        '../iron-meta/compiled_resources2.gyp:iron-meta-extracted',
+        '../iron-menu-behavior/compiled_resources2.gyp:iron-menu-behavior-extracted',
       ],
       'includes': ['../../../../closure_compiler/compile_js2.gypi'],
     },
   ],
 }