Disable regression tests option now available in git!

[Austin English]

For those of you that don't monitor wine-commit, Alexandre committed a
patch today to disable building the regression tests:
http://source.winehq.org/git/wine.git/?a=commitdiff;h=35078f4b57523d4afe00d0...

So the manual PITA patching is no longer necessary.

I've updated the Regression Testing wiki page as well.

Thanks Alexandre!

-- 
-Austin