log: Disable stdout buffering. I want to see output sooner in journalctl.

src/main.c

@@ -2026,6 +2026,7 @@ void tf_run_thread_start(const char* zip_path)
 #else
 int main(int argc, char* argv[])
 {
+	setvbuf(stdout, NULL, _IONBF, 0);
 	_startup(argc, argv);
 	ares_library_init(0);