Adjust virtlogd sysconfig file to conform to SUSE standards

Index: libvirt-7.0.0/src/logging/virtlogd.sysconf
===================================================================
--- libvirt-7.0.0.orig/src/logging/virtlogd.sysconf
+++ libvirt-7.0.0/src/logging/virtlogd.sysconf
@@ -1,3 +1,7 @@
+## Path: System/Virtualization/virtlogd
+
+## Type: string
+## Default: ""
 # Customizations for the virtlogd.service systemd unit
 
 VIRTLOGD_ARGS=""