libmemif: slave connecting bugfix

in case first connecting slave fails continue connecting others
add disconnect string to memif details

Change-Id: I9d83db4724de1cab60786dca566e004016cf1e59
Signed-off-by: Jakub Grajciar <jgrajcia@cisco.com>
diff --git a/extras/libmemif/examples/icmp_responder-epoll/main.c b/extras/libmemif/examples/icmp_responder-epoll/main.c
index 70095dd..02414fa 100644
--- a/extras/libmemif/examples/icmp_responder-epoll/main.c
+++ b/extras/libmemif/examples/icmp_responder-epoll/main.c
@@ -212,7 +212,10 @@
       if (md.link_up_down)
 	printf ("up\n");
       else
-	printf ("down\n");
+	{
+	  printf ("down\n");
+	  printf ("\treason: %s\n", md.error);
+	}
     }
   free (buf);
 }