[gupnp-tools] Event Dumper: Add file copyright and license

[Jens Georg <jensgeorg src gnome org>]

commit bc61ccddc1cc441acee99658f9c5042383821516
Author: Jens Georg <mail jensge org>
Date:   Tue Oct 11 22:07:02 2022 +0200

    Event Dumper: Add file copyright and license

 src/event-dumper/event-dumper.c | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/src/event-dumper/event-dumper.c b/src/event-dumper/event-dumper.c
index 5c48b8b..5daa667 100644
--- a/src/event-dumper/event-dumper.c
+++ b/src/event-dumper/event-dumper.c
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+// SPDX-FileCopyrightText: Copyright 2022 Jens Georg <mail jensge org>
+
 #include <config.h>
 
 #include <glib-unix.h>