[NaCl SDK] Add nacl_io and sdk_util namespaces.

native_client_sdk/src/libraries/nacl_io/kernel_intercept.cc

 /* 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 <errno.h>
 #include "nacl_io/kernel_intercept.h"
 #include "nacl_io/kernel_proxy.h"
 #include "nacl_io/kernel_wrap.h"
 #include "nacl_io/pepper_interface.h"
 #include "nacl_io/pepper_interface.h"
 #include "nacl_io/real_pepper_interface.h"
 
+using namespace nacl_io;
 
 static KernelProxy* s_kp;
 
 void ki_init(void* kp) {
   ki_init_ppapi(kp, 0, NULL);
 }
 
 void ki_init_ppapi(void* kp,
                    PP_Instance instance,
                    PPB_GetInterface get_browser_interface) {
@@ skipping 162 matching lines @@
   return s_kp->fchown(fd, owner, group);
 }
 
 int ki_lchown(const char* path, uid_t owner, gid_t group) {
   return s_kp->lchown(path, owner, group);
 }
 
 int ki_utime(const char* filename, const struct utimbuf* times) {
   return s_kp->utime(filename, times);
 }