feat(groups/{u,v,w,x}*): vim syntax support

Add vim modeline instructing the editor to use syntax plugin provided by apparmor.
Continuation of #395 to keep the diff list relatively short.

apparmor.d/groups/ubuntu/ubuntu-report

@@ -26,4 +26,6 @@ profile ubuntu-report @{exec_path} {
   @{sys}/kernel/mm/transparent_hugepage/hpage_pmd_size r,
 
   include if exists <local/ubuntu-report>
-}
+}
+
+# vim:syntax=apparmor