winmm 16/32 code split

[Eric Pouech]

> I don't really see how you
> would do that in winebuild since they need to be allocated
> dynamically.
well, address is only known as runtime, but call framework is
always the same. if the number of thunks is fixed (which is
anyway the assumption made in existing code), then the code
can be generated automatically (of course will eat up lots
of pages)
dynamic generation is a bit more of code, but since it's the 
way it's done in the rest of the code...
A+