osc_rdma_peer: properly include ompi_config.h

Thanks to Paul Hargrove for reporting.

Signed-off-by: Jeff Squyres <jsquyres@cisco.com>

ompi/mca/osc/rdma/osc_rdma_peer.c

@@ -4,6 +4,7 @@
  *                         reserved.
  * Copyright (c) 2015      Research Organization for Information Science
  *                         and Technology (RIST). All rights reserved.
+ * Copyright (c) 2016 Cisco Systems, Inc.  All rights reserved.
  * $COPYRIGHT$
  *
  * Additional copyrights may follow
@@ -11,6 +12,8 @@
  * $HEADER$
  */
 
+#include "ompi_config.h"
+
 #ifdef HAVE_ALLOCA_H
 #include <alloca.h>
 #endif