CONTRIB: debug: report stream-int's flag SI_FL_CLEAN_ABRT

It was missing.
diff --git a/contrib/debug/flags.c b/contrib/debug/flags.c
index 6e95684..9e9b3f7 100644
--- a/contrib/debug/flags.c
+++ b/contrib/debug/flags.c
@@ -220,7 +220,7 @@
 	SHOW_FLAG(f, SI_FL_NOHALF);
 	SHOW_FLAG(f, SI_FL_SRC_ADDR);
 	SHOW_FLAG(f, SI_FL_WANT_GET);
-
+	SHOW_FLAG(f, SI_FL_CLEAN_ABRT);
 	SHOW_FLAG(f, SI_FL_RXBLK_CHAN);
 	SHOW_FLAG(f, SI_FL_RXBLK_BUFF);
 	SHOW_FLAG(f, SI_FL_RXBLK_ROOM);