ip: fix format string when reading statistics

The tunnel code was doing sscanf(buf, "%ld", &x) where x was unsigned
long.

ip/ip6tunnel.c

@@ -354,7 +354,7 @@ static int do_tunnels_list(struct ip6_tnl_parm2 *p)
 			fprintf(stderr, "Wrong format for /proc/net/dev. Giving up.\n");
 			goto end;
 		}
-		if (sscanf(ptr, "%ld%ld%ld%ld%ld%ld%ld%*d%ld%ld%ld%ld%ld%ld%ld",
+		if (sscanf(ptr, "%lu%lu%lu%lu%lu%lu%lu%*d%lu%lu%lu%lu%lu%lu%lu",
 			   &rx_bytes, &rx_packets, &rx_errs, &rx_drops,
 			   &rx_fifo, &rx_frame, &rx_multi,
 			   &tx_bytes, &tx_packets, &tx_errs, &tx_drops,

ip/iptunnel.c

@@ -419,7 +419,7 @@ static int do_tunnels_list(struct ip_tunnel_parm *p)
 			fprintf(stderr, "Wrong format for /proc/net/dev. Giving up.\n");
 			goto end;
 		}
-		if (sscanf(ptr, "%ld%ld%ld%ld%ld%ld%ld%*d%ld%ld%ld%ld%ld%ld%ld",
+		if (sscanf(ptr, "%lu%lu%lu%lu%lu%lu%lu%*d%lu%lu%lu%lu%lu%lu%lu",
 			   &rx_bytes, &rx_packets, &rx_errs, &rx_drops,
 			   &rx_fifo, &rx_frame, &rx_multi,
 			   &tx_bytes, &tx_packets, &tx_errs, &tx_drops,