[fortran,patch] Wide characeters, main patch

[Tobias Burnus]

FX wrote:
> Well, I said only the final patch was missing, but it's getting very 
> long to make completely cleanly, because there are so many intrinsics 
> to fully check. So, to ease review and allow you to review the patch 
> while I work on the last missing intrinsics, here is the main part of 
> the patch enabling full wide strings support. 
The libgfortran change is OK.

(I will look at the front-end patch later today.)

Tobias