[Sync] Move 'sync_listen_notifications' target to sync/tools

sync/sync.gyp

Index: sync/sync.gyp
diff --git a/sync/sync.gyp b/sync/sync.gyp
index 59073adb58bb8a7f0cbe9f4009295831a67c79c2..93df7918feb1b6512c523cd2a5fd3cc5f7ea25e6 100644
--- a/sync/sync.gyp
+++ b/sync/sync.gyp
@@ -469,5 +469,22 @@
         }],
       ],
     },
+
+    # A tool to listen to sync notifications and print them out.
+    {
+      'target_name': 'sync_listen_notifications',
+      'type': 'executable',
+      'dependencies': [
+        '../base/base.gyp:base',
+        '../jingle/jingle.gyp:notifier',
+        '../net/net.gyp:net',
+        '../net/net.gyp:net_test_support',
+        'sync',
+        'sync_notifier',
+      ],
+      'sources': [
+        'tools/sync_listen_notifications.cc',
+      ],
+    },
   ],
 }