[lwIP] export more symbols

components/net/lwip-1.4.1/src/arch/sys_arch.c

@@ -695,3 +695,17 @@ RTM_EXPORT(dhcp_stop);
 #include <lwip/netifapi.h>
 RTM_EXPORT(netifapi_netif_set_addr);
 #endif
+
+#if LWIP_NETIF_LINK_CALLBACK
+RTM_EXPORT(netif_set_link_callback);
+#endif
+
+#if LWIP_NETIF_STATUS_CALLBACK
+RTM_EXPORT(netif_set_status_callback);
+#endif
+
+RTM_EXPORT(netif_find);
+RTM_EXPORT(netif_set_addr);
+RTM_EXPORT(netif_set_ipaddr);
+RTM_EXPORT(netif_set_gw);
+RTM_EXPORT(netif_set_netmask);