Convert to SPDX compatible license tag (#229)

Signed-off-by: Radovan Sroka <rsroka@redhat.com>

Author: radosroka

fapolicyd.spec

@@ -2,7 +2,7 @@ Summary: Application Whitelisting Daemon
 Name: fapolicyd
 Version: 1.2.1
 Release: 1
-License: GPLv3+
+License: GPL-3.0-or-later
 URL: http://people.redhat.com/sgrubb/fapolicyd
 Source0: https://people.redhat.com/sgrubb/fapolicyd/%{name}-%{version}.tar.gz
 BuildRequires: gcc