programs: add rudimentary dxdiag

[Juan Lang]

> http://www.winehq.org/pipermail/wine-patches/2008-June/056911.html

Ah.  That's not enough to judge where your patches are going.  A
series of patches, adding a stub program, then adding a little more to
it, and so on, would help judge the final product, while considering
each piece independently.  It has the risk of getting rejected partway
or wholesale, but has a higher likelihood of getting comments.  It
also removes a lot of the roundtrip time with patches.

Sorry if the guidance isn't very clear.  Don't be afraid to ask AJ on
irc for more feedback too.
--Juan