Add missing header file

This commit was SVN r30556.

opal/mca/sec/base/sec_base_select.c

@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2014      Intel, Inc. All rights reserved.
+ * Copyright (c) 2014 Cisco Systems, Inc.  All rights reserved.
  * $COPYRIGHT$
  * 
  * Additional copyrights may follow
@@ -14,6 +15,7 @@
 
 #include "opal/mca/mca.h"
 #include "opal/mca/base/base.h"
+#include "opal/util/output.h"
 
 #include "opal/mca/sec/base/base.h"