[NaCl SDK] Get nacl_mounts_tests building.

native_client_sdk/src/libraries/nacl_mounts_test/kernel_object_test.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 <fcntl.h>
 #include <pthread.h>
 #include <sys/stat.h>
-#include <unistd.h>
 
 #include <map>
 #include <string>
 
 #include "nacl_mounts/kernel_handle.h"
 #include "nacl_mounts/kernel_object.h"
 #include "nacl_mounts/mount.h"
 #include "nacl_mounts/path.h"
 
-#define __STDC__ 1
 #include "gtest/gtest.h"
 
 int g_MountCnt = 0;
 int g_HandleCnt = 0;
 
 class MountRefMock : public Mount {
  public:
   MountRefMock() : Mount() { g_MountCnt++; }
   ~MountRefMock() { g_MountCnt--; }
 
@@ skipping 83 matching lines @@
 
   proxy->FreeFD(fd3);
   EXPECT_EQ(1, g_HandleCnt);
   EXPECT_EQ(1, g_MountCnt);
 
   proxy->FreeFD(fd2);
   EXPECT_EQ(0, g_HandleCnt);
   EXPECT_EQ(0, g_MountCnt);
 }