antithread: correctly list ccan/typesafe_cb as dependency.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

ccan/antithread/_info

@@ -96,6 +96,7 @@ int main(int argc, char *argv[])
 		printf("ccan/noerr\n");
 		printf("ccan/read_write_all\n"); /* For tests */
 		printf("ccan/talloc\n");
+		printf("ccan/typesafe_cb\n");
 		return 0;
 	}