Fix build with r2 >= 5.9.9

Author: radare

src/io_frida.c

@@ -1587,7 +1587,11 @@ static void exec_pending_cmd_if_needed(RIOFrida * rf) {
 	if (!rf->pending_cmd) {
 		return;
 	}
+#if R2_VERSION_NUMBER >= 50909
+	char *output = COREBIND (rf->io).cmdStr (rf->r2core, rf->pending_cmd->cmd_string);
+#else
 	char *output = COREBIND (rf->io).cmdstr (rf->r2core, rf->pending_cmd->cmd_string);
+#endif
 
 	ut64 serial = rf->pending_cmd->serial;
 	pending_cmd_free (rf->pending_cmd);