Don't compile winetest as part of the main build

[Mike Hearn]

> I have a 500 mhz laptop with 128 mv of ram, and winetest builds quite
> successfully, so maybe it's something wrong with
> your build toolchain, or your configuration, or something else like that?

Maybe, yes. How long does it take? I think I killed it after about 5 
minutes of constant thrashing.

Possibly it's something to do with using the FC2 kernel instead of a 
stock one ?