[NaCl SDK] Create Filesystem nodes in /dev/fs/...

native_client_sdk/src/libraries/nacl_io/filesystem.cc

 // 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.
 
 #include "nacl_io/filesystem.h"
 
 #include <errno.h>
 #include <fcntl.h>
 #include <string>
 
@@ skipping 30 matching lines @@
 void Filesystem::OnNodeCreated(Node* node) {
   node->stat_.st_ino = inode_pool_.Acquire();
   node->stat_.st_dev = dev_;
 }
 
 void Filesystem::OnNodeDestroyed(Node* node) {
   if (node->stat_.st_ino)
     inode_pool_.Release(node->stat_.st_ino);
 }
 
+Error Filesystem::Filesystem_VIoctl(int request, va_list args) {
+  return EINVAL;
+}
+
 }  // namespace nacl_io