portability improvements for wineshelllink script

[Dustin Navea]

Francois Gouget wrote:
> This is true too but I think most Wine developers will agree with me 
> that Wine should not depend on bash which means the above is not 'the 
> right fix(tm)' which makes it 'the wrong fix'.

Of course The Microsoft Fix(tm) would be to say "ahh to hell with it. 
Lets make our own proprietary shell and require that everyone using our 
product use that" :-D *ducks and runs for cover* I feel the heat of your 
flames already!

Dustin