Restructure the ipc_fuzzer directory.

tools/ipc_fuzzer/message_tools/ipclist.gyp

-# Copyright 2014 The Chromium Authors. All rights reserved.
+# Copyright 2015 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.
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
       'target_name': 'ipclist',
       'type': 'executable',
       'defines': [
         'FULL_SAFE_BROWSING',
       ],
       'dependencies': [
         '../message_lib/message_lib.gyp:ipc_message_lib',
       ],
       'sources': [
         'ipclist.cc',
       ]
     }
   ]
 }