Add myself (jln) to the Linux sandbox watchlist

WATCHLISTS

 # 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.
 
 # Watchlist Rules
 # Refer: http://dev.chromium.org/developers/contributing-code/watchlists
 
 
 {
   'WATCHLIST_DEFINITIONS': {
@@ skipping 357 matching lines @@
     'worker': ['jam@chromium.org'],
     'extension': ['aa@chromium.org',
                   'mihaip-chromium-reviews@chromium.org'],
     'net': ['darin-cc@chromium.org', 'cbentzel+watch@chromium.org'],
     'net_error_list': ['mmenke@chromium.org'],
     'net_log': ['mmenke@chromium.org', 'eroman@chromium.org'],
     'ftp': ['phajdan.jr@chromium.org'],
     'dns': ['mmenke@chromium.org'],
     'media': ['feature-media-reviews@chromium.org'],
     'ipc': ['jam@chromium.org', 'darin-cc@chromium.org'],
-    'linux-sandboxing': ['agl@chromium.org'],
+    'linux-sandboxing': ['agl@chromium.org', 'jln+watch@chromium.org'],
     'sync': ['tim@chromium.org', 'nick@chromium.org',
              'akalin@chromium.org', 'rsimha@chromium.org'],
     'tools': ['pam+watch@chromium.org'],
     'tests': [],
     'automation': ['kkania@chromium.org',
                    'robertshield@chromium.org'],
     'chrome_frame': ['amit@chromium.org', 'grt+watch@chromium.org',
                      'robertshield@chromium.org'],
     'nacl': ['native-client-reviews@googlegroups.com'],
     'appcache': ['michaeln@chromium.org'],
@@ skipping 72 matching lines @@
     'omnibox': ['suzhe@chromium.org'],
     'message_loop': ['sadrul@chromium.org'],
     'clipboard': ['dcheng@chromium.org'],
     'metrics': ['jar@chromium.org',
                 'isherman@chromium.org',
                 'mad@chromium.org'],
     'speech': ['satish@chromium.org'],
     'installer': ['grt+watch@chromium.org'],
   },
 }