Avoid stack overflow write 1 in ipc fuzzer.

tools/ipc_fuzzer/message_lib/message_lib.gyp

 # Copyright 2013 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': [
     {
@@ skipping 13 matching lines @@
         'message_file.h',
         'message_file_format.h',
         'message_file_reader.cc',
         'message_file_writer.cc',
         'message_names.cc',
         'message_names.h',
       ],
       'include_dirs': [
         '../../..',
       ],
+      'defines': [
+        'USE_CUPS',
+      ],
     },
   ],
 }