winscard: add pcsc-lite helpers for upcoming(?) implementation

[Juan Lang]

> To my knowledge the integration of the patches by Mounir IDRASSI has been
> rejected due to missing automated tests. This is a problem since for a full
> test someone has to write/provide an IFD handler which emulates some stuff.

IIRC, there was also a problem with the way it integration was done.
It assumed the types between the Windows scard API and the Linux one
were compatible, but in fact they may not be.  I don't recall that
this was ever addressed.
--Juan