Add "scrypt" to third_party for secure password hashes

third_party/scrypt/scrypt.gyp

 # Copyright (c) 2012 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.
 
 {
   'targets': [
     {
-      'target_name': 'mt19937ar',
+      'target_name': 'libscrypt',
       'type': 'static_library',
       'sources': [
-        'mt19937ar.cc',
-        'mt19937ar.h',
+        'lib/crypto/sha256.c',
+        'lib/crypto/crypto_scrypt-nosse.c',
       ],
       'include_dirs': [
-        '../..',
+        '.',
       ],
     },
   ],
 }