[NaCl SDK] rename nacl_io demo.

native_client_sdk/src/examples/demo/nacl_io_demo/handlers.c

 /* 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. */
 
 #include "handlers.h"
 
 #include <arpa/inet.h>
 #include <assert.h>
 #include <errno.h>
 #include <limits.h>
@@ skipping 1094 matching lines @@
   int result = close(sock);
   if (result != 0) {
     *out_error = PrintfToNewString("close returned error: %d", errno);
     return 1;
   }
 
   CREATE_RESPONSE(close);
   RESPONSE_INT(sock);
   return 0;
 }