[patch]: handle ppc-xcoff in bfd_get_sign_extend_vma

[Nick Clifton]

Hi Tristan,

> bfd/
> 2011-05-23  Tristan Gingold<gingold@adacore.com>
>
>          * bfd.c (bfd_get_sign_extend_vma): Handle aixcoff.

Approved - please apply.

Cheers
   Nick