r/vmhost: Create directory for console logs

Need a directory where _libvirt_ can write logs from VM serial console
output.

roles/vmhost/tasks/main.yml

@@ -36,6 +36,16 @@
   - qemu
   - storage
 
+- name: ensure libvirt console log directory exists
+  file:
+    path: /var/log/libvirt/console
+    owner: root
+    group: root
+    mode: u=rwx,go=
+    state: directory
+  tags:
+  - log-dir
+
 - name: ensure libvirtd starts at boot
   service:
     name: libvirtd