config: add new element ts_label in struct interface

Add new element ts_label in struct interface to track real ts interface.

Signed-off-by: Hangbin Liu <[email protected]>

config.h

@@ -36,6 +36,7 @@
 struct interface {
 	STAILQ_ENTRY(interface) list;
 	char name[MAX_IFNAME_SIZE + 1];
+	char ts_label[MAX_IFNAME_SIZE + 1];
 	struct sk_ts_info ts_info;
 };