charon-tkm: Deinitialize IKE tkm-rpc client

This is necessary if tkm-rpc supports multiple parallel client requests.

src/charon-tkm/src/tkm/tkm.c

@@ -119,6 +119,8 @@ void tkm_deinit()
 
 	ees_server_finalize();
 
+	ike_finalize();
+
 	tkmlib_final();
 	free(this);
 	tkm = NULL;