CONTRIB: debug: add missing flags SI_FL_L7_RETRY & SI_FL_D_L7_RETRY

These ones were missing from debug/flags.
diff --git a/contrib/debug/flags.c b/contrib/debug/flags.c
index e958f97..a596b1a 100644
--- a/contrib/debug/flags.c
+++ b/contrib/debug/flags.c
@@ -252,6 +252,8 @@
 	SHOW_FLAG(f, SI_FL_RXBLK_ROOM);
 	SHOW_FLAG(f, SI_FL_RXBLK_SHUT);
 	SHOW_FLAG(f, SI_FL_RX_WAIT_EP);
+	SHOW_FLAG(f, SI_FL_L7_RETRY);
+	SHOW_FLAG(f, SI_FL_D_L7_RETRY);
 
 	if (f) {
 		printf("EXTRA(0x%08x)", f);