print con mark as hex value in xml output

this allows for easier reading, since the mark is actually
separated into a high and low field.

Change-Id: I00c1c3e595fd365db5691081c06eec2f8bf9dd9d
Signed-off-by: Nicolas Costa <ncosta@codeaurora.org>
diff --git a/shortcut-fe/sfe_ipv4.c b/shortcut-fe/sfe_ipv4.c
index 07ba2fe..798329e 100644
--- a/shortcut-fe/sfe_ipv4.c
+++ b/shortcut-fe/sfe_ipv4.c
@@ -3021,7 +3021,7 @@
 				"dest_port=\"%u\" dest_port_xlate=\"%u\" "
 				"dest_rx_pkts=\"%llu\" dest_rx_bytes=\"%llu\" "
 				"last_sync=\"%llu\" "
-				"mark=\"%u\" />\n",
+				"mark=\"%08x\" />\n",
 				protocol,
 				src_dev->name,
 				&src_ip, &src_ip_xlate,