Ping Re: Consistently include Makeconfig after defining subdir

[Roland McGrath]

> The real question is the design point - whether we want to establish this 
> standard location to include Makeconfig even if the subdirectory doesn't 
> actually need it - not the details of the diffs used to achieve that 
> design.

I initially didn't like it, but I don't have a good reason other than a
vague aversion to clutter.  Since it makes a picayune and subtle area more
straightforward to have a standard formula, it's probably the right choice.