[NaCl SDK] Enable linux host build for nacl_io and nacl_io_tests.

native_client_sdk/src/libraries/nacl_io/ostermios.h

 /* 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. */
 
 #ifndef LIBRARIES_NACL_IO_OSTERMIOS_H
 #define LIBRARIES_NACL_IO_OSTERMIOS_H
 
-#if defined(__native_client__)
-
-#include <termios.h>
-
-#else
+#if defined(WIN32)
 
 #include "sdk_util/macros.h"
 
 typedef unsigned char cc_t;
 typedef unsigned short tcflag_t;
 typedef char speed_t;
 
 #define NCCS 32
 struct termios {
   tcflag_t c_iflag;
   tcflag_t c_oflag;
   tcflag_t c_cflag;
   tcflag_t c_lflag;
   char c_line;
   cc_t c_cc[NCCS];
   speed_t c_ispeed;
   speed_t c_ospeed;
 };
 
 
 EXTERN_C_BEGIN
 
 int tcgetattr(int fd,struct termios *termios_p);
 int tcsetattr(int fd,int optional_actions,const struct termios *termios_p);
 
 EXTERN_C_END
 
+#else
+
+#include <termios.h>
+
 #endif
 
+
 #endif  /* LIBRARIES_NACL_IO_OSTERMIOS_H */