feat(groups/{_,k,n,p}*): vim syntax support

Add vim modeline instructing the editor to use syntax plugin provided by apparmor.
Continuation of #394 to keep the diff list relatively short.

apparmor.d/groups/kde/ksmserver

@@ -71,3 +71,5 @@ profile ksmserver @{exec_path} flags=(attach_disconnected,mediate_deleted) {
 
   include if exists <local/ksmserver>
 }
+
+# vim:syntax=apparmor