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

native_client_sdk/src/libraries/nacl_mounts/kernel_wrap_glibc.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-glibc build.
+#if defined(__native_client__) && defined(__GLIBC__)
+
 #include "nacl_mounts/kernel_wrap.h"
 #include <alloca.h>
 #include <dirent.h>
 #include <errno.h>
 #include <irt.h>
 #include <irt_syscalls.h>
 #include <nacl_stat.h>
 #include <string.h>
 #include <sys/stat.h>
 #include "nacl_mounts/kernel_intercept.h"
 
+
 namespace {
 
 void stat_to_nacl_stat(const struct stat* buf, nacl_abi_stat* nacl_buf) {
   memset(nacl_buf, 0, sizeof(struct nacl_abi_stat));
   nacl_buf->nacl_abi_st_dev = buf->st_dev;
   nacl_buf->nacl_abi_st_ino = buf->st_ino;
   nacl_buf->nacl_abi_st_mode = buf->st_mode;
   nacl_buf->nacl_abi_st_nlink = buf->st_nlink;
   nacl_buf->nacl_abi_st_uid = buf->st_uid;
   nacl_buf->nacl_abi_st_gid = buf->st_gid;
@@ skipping 241 matching lines @@
     DO_WRAP(getdents);
     DO_WRAP(mkdir);
     DO_WRAP(open);
     DO_WRAP(read);
     DO_WRAP(rmdir);
     DO_WRAP(seek);
     DO_WRAP(stat);
     DO_WRAP(write);
   }
 } nacl_mounts_static_initializer;
+
+#endif  // defined(__native_client__) && defined(__GLIBC__)