[NaCl SDK] Add nacl_mounts to NaCl SDK build. Experimental for now.

native_client_sdk/src/libraries/nacl_mounts/ostypes.h

Index: native_client_sdk/src/libraries/nacl_mounts/ostypes.h
diff --git a/native_client_sdk/src/libraries/nacl_mounts/ostypes.h b/native_client_sdk/src/libraries/nacl_mounts/ostypes.h
new file mode 100644
index 0000000000000000000000000000000000000000..39fa145ee59f8b8030941c1f7ab70441315db0d3
--- /dev/null
+++ b/native_client_sdk/src/libraries/nacl_mounts/ostypes.h
@@ -0,0 +1,19 @@
+/* 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.
+ */
+#ifndef LIBRARIES_NACL_MOUNTS_OSTYPES_H_
+#define LIBRARIES_NACL_MOUNTS_OSTYPES_H_
+
+#include <sys/types.h>
+
+#if defined(WIN32)
+
+#include <BaseTsd.h>
+
+typedef int mode_t;
+typedef SSIZE_T ssize_t;
+
+#endif
+
+#endif  // LIBRARIES_NACL_MOUNTS_OSTYPES_H_