Added necessary files for SAF support

includes/polling/os/saf.inc.php

@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * LibreNMS
+ *
+ * Copyright (c) 2014 Neil Lathwood <https://github.com/laf/ http://www.lathwood.co.uk/fa>
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or (at your
+ * option) any later version.  Please see LICENSE.txt at the top level of
+ * the source code distribution for details.
+*/
+
+list(,$version,,$hardware,$serial,,) = explode(";", $poll_device['sysDescr']);
+list(,$hardware) = explode(":", $hardware);
+list(,$serial) = explode(":", $serial);
+