[NaCl SDK] nacl_io: Add initial implementations of kill and signal

native_client_sdk/src/libraries/nacl_io/ossignal.h

Index: native_client_sdk/src/libraries/nacl_io/ossignal.h
diff --git a/native_client_sdk/src/libraries/nacl_io/ossignal.h b/native_client_sdk/src/libraries/nacl_io/ossignal.h
new file mode 100644
index 0000000000000000000000000000000000000000..3ce00718e4893b2133a6d12d353bedd3beca1204
--- /dev/null
+++ b/native_client_sdk/src/libraries/nacl_io/ossignal.h
@@ -0,0 +1,17 @@
+/* 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_OSSIGNAL_H_
+#define LIBRARIES_NACL_IO_OSSIGNAL_H_
+
+#ifdef __native_client__
+#include <signal.h>
+#ifdef __GLIBC__
+typedef __sighandler_t sighandler_t;
+#else
+typedef _sig_func_ptr sighandler_t;
+#endif
+#endif
+
+#endif