[NaCl SDK] Change the kernel_wrap OS #ifdefs in nacl_mounts.

native_client_sdk/src/libraries/nacl_mounts/kernel_wrap_newlib.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 <sys/types.h>  // Include something that will define __GLIBC__.
+
+// The entire file is wrapped in this #if. We do this so this .cc file can be
+// compiled, even on a non-newlib build.
+#if defined(__native_client__) && !defined(__GLIBC__)
+
 #include "nacl_mounts/kernel_wrap.h"
 #include <dirent.h>
 #include <errno.h>
 #include <irt.h>
 #include <sys/stat.h>
 #include "nacl_mounts/kernel_intercept.h"
 
 EXTERN_C_BEGIN
 
 #define REAL(name) __nacl_irt_##name##_real
@@ skipping 138 matching lines @@
     DO_WRAP(fdio, dup);
     DO_WRAP(fdio, fstat);
     DO_WRAP(fdio, getdents);
     DO_WRAP(fdio, read);
     DO_WRAP(fdio, seek);
     DO_WRAP(fdio, write);
     DO_WRAP(filename, open);
     DO_WRAP(filename, stat);
   }
 } nacl_mounts_static_initializer;
+
+#endif  // defined(__native_client__) && !defined(__GLIBC__)