Add bpf_redirect_map function in bpf_helpers.h

packet-exchange/src/bpf_helpers.h

@@ -35,6 +35,8 @@ static int (*bpf_perf_event_read)(void *map, int index) =
 	(void *) BPF_FUNC_perf_event_read;
 static int (*bpf_clone_redirect)(void *ctx, int ifindex, int flags) =
 	(void *) BPF_FUNC_clone_redirect;
+static int (*bpf_redirect_map)(void *map, int key, int flags) =
+	(void *) BPF_FUNC_redirect_map;
 static int (*bpf_redirect)(int ifindex, int flags) =
 	(void *) BPF_FUNC_redirect;
 static int (*bpf_perf_event_output)(void *ctx, void *map,