Don't compile winetest as part of the main build

[Ivan Leo Puoti]

> On my laptop (a 600mhz Pentium with 128mb of ram, so 
> not too pokey) attempting to build the winetest binary actually kills 
> the build dead.
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?

Ivan.