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

native_client_sdk/src/libraries/nacl_io/ostermios.h

Index: native_client_sdk/src/libraries/nacl_io/ostermios.h
diff --git a/native_client_sdk/src/libraries/nacl_io/ostermios.h b/native_client_sdk/src/libraries/nacl_io/ostermios.h
index 03c4b6cc6cf9c6052f9fc1d1979c1c01af1ad6e8..a03b8a79c235552b656d153489324da216b85f95 100644
--- a/native_client_sdk/src/libraries/nacl_io/ostermios.h
+++ b/native_client_sdk/src/libraries/nacl_io/ostermios.h
@@ -5,11 +5,7 @@
 #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"
 
@@ -37,6 +33,11 @@ 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 */