[NaCl SDK] Compile for naclio for Bionic

native_client_sdk/src/libraries/nacl_io/syscalls/tcflush.c

-// Copyright (c) 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.
+/* 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 <sys/types.h>
+/*
+ * Include something that will define __BIONIC__, then wrap the entire file
+ * in this #if, so this file will be compiled on a non-bionic build.
+ */
+
+#if !defined(__BIONIC__)
+
 #include "nacl_io/kernel_intercept.h"
 #include "nacl_io/ostermios.h"
 
 int tcflush(int fd, int queue_selector) {
   return ki_tcflush(fd, queue_selector);
 }
 
+#endif /* #if !defined(__BIONIC_) */