[Bug 30718] xna40 installation fails, needs sfc.LoadSfcDLL

https://bugs.winehq.org/show_bug.cgi?id=30718

--- Comment #6 from Austin English  ---
(In reply to Dan Kegel from comment #0)
> The next dialog was "DXSetup.exe - Unable to find a version of the runtime
> to run this application".
> (The DXSetup.exe that was running is the one bundled with the
> xna40 redistributable, and you can also see this error with "winetricks
> xna40".)

This was caused by using dotnet40 instead of dotnet45. I've fixed this in
winetricks.