While I prefer not to have generated files in the source repository,
do this for now in the interest of sanity on the Windows side (to allow
building directly from a SVN checkout).
An alternative might be to require Python on Windows when building from
SVN. If at some point we decide to go that route, it will be easy enough
to remove these files and add the necessary bits to Mkfiles/vc and
Mkfiles/vc8.
svn path=/trunk/yasm/; revision=1938