wine.inf: add Internet Explorer AppPath registry key

[Mikołaj Zalewski]

>
> Why don't you try it yourself and see if it works?
>   
  When I tried it last time it didn't work at all - it wrote it can't 
find Microsoft servers. But now I gave it another try and it worked with 
the AppPath (it doesn't work with `winetricks fakeie6` - the Version and 
VersionVector should not be filled for IE to install).

Mikołaj Zalewski