workstation: claptrap: add machine specfic X11 config

manifests/workstation/claptrap.pp

+#
+class freebsd::workstation::claptrap {
+    file { '/usr/local/etc/X11/xorg.conf':
+      ensure => file,
+      source => 'puppet:///modules/freebsd/workstation/claptrap-xorg.conf',
+      owner  => 'root',
+      group  => 'wheel',
+      mode   => '0644',
+    }
+}