add back a missing a header taken away in r18664

This commit was SVN r18682.

The following SVN revision numbers were found above:
  r18664 --> open-mpi/ompi@0532d799d6

orte/mca/snapc/full/snapc_full_local.c

@@ -54,6 +54,7 @@
 #include "orte/util/name_fns.h"
 #include "orte/runtime/orte_wait.h"
 #include "orte/util/proc_info.h"
+#include "orte/mca/rml/rml.h"
 #include "orte/mca/plm/plm.h"
 #include "orte/mca/odls/odls.h"
 #include "orte/mca/odls/base/base.h"