Use the new swapvp function

[Steven Edwards]

shell32 shelllink.c uses fork on line 748 and waitpid on line 789

Dimitrie O. Paun wrote:

>As promissed...
>
>Any other places that may need it?
>
>ChangeLog
>  Make use of the new swapvp function in wine{gcc,wrap}.
>
>
>  
>