unbreak individual module building

[Justin C. Sherrill]

On Sun, November 12, 2006 2:38 pm, Matthew Dillon wrote:

>    This allows us to omit pure forwarding header files.  It also means
>    that ALL sources must access platform or cpu architecture headers
>    via <machine/*.h> or risk becoming a porting nightmare when we expand
>    to other cpu architectures.

After this file shuffle, is it going to be worthwhile to port to other
architectures?  It'd be nice, especially since pkgsrc is already
cross-platform.