[Patch]: Handle nested archives (in bfd)

[nick clifton]

Hi Tristan,

> bfd/
> 2012-01-04  Tristan Gingold<gingold@adacore.com>
>
> 	* bfdio.c (bfd_tell): Handle nested archives.
> 	(bfd_seek): Ditto.
> 	* cache.c (bfd_cache_lookup_worker): Ditto.
> 	* archive.c (_bfd_get_elt_at_filepos): Remove code dealing with
> 	nested archives.
> 	(bfd_generic_openr_next_archived_file): Likewise.

Approved - please apply.

Cheers
   Nick