Fixing permission for libvirtd.log

Fixing permissions so all users could access libvirtd.log

Change-Id: I6f63a847ba9c5591a87922d3b117b101100b2fad
Closes-Bug: 1563430
Co-Authored-By: Steven Dake <stdake@cisco.com>

docker/nova/nova-libvirt/extend_start.sh

@@ -15,7 +15,10 @@ fi
 
 if [[ ! -d "/var/log/kolla/libvirt" ]]; then
     mkdir -p /var/log/kolla/libvirt
+    touch /var/log/kolla/libvirt/libvirtd.log
+    chmod 644 /var/log/kolla/libvirt/libvirtd.log
 fi
 if [[ $(stat -c %a /var/log/kolla/libvirt) != "755" ]]; then
     chmod 755 /var/log/kolla/libvirt
+    chmod 644 /var/log/kolla/libvirt/libvirtd.log
 fi