udev.pc: add license header

All other .pc files have the same header. Not sure why this one
was forgotten.

diff --git a/src/udev/udev.pc.in b/src/udev/udev.pc.in
index 7b4f4006b56d405a42d39d786eaf37cef645310d..05caca0ca92354b5545e34fb7706d8534defa79c 100644 (file)
--- a/src/udev/udev.pc.in
+++ b/src/udev/udev.pc.in
@@ -1,3 +1,12 @@
+#  SPDX-License-Identifier: LGPL-2.1-or-later
+#
+#  This file is part of systemd.
+#
+#  systemd is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU Lesser General Public License as published by
+#  the Free Software Foundation; either version 2.1 of the License, or
+#  (at your option) any later version.
+
 Name: udev
 Description: udev
 Version: @PROJECT_VERSION@