[RFA] Fix corefile-write support for Unixware

[Nick Clifton]

Hi Michael,

  [Sorry for the long delay...]

> This patch makes writing of corefiles work on Unixware, 
> plus silences a few compiler warnings by adding prototype declarations.
> 
> 2002-02-11  Michael Snyder  <msnyder@redhat.com>
> 
>         * elf-bfd.h (elfcore_write_lwpstatus): Add prototype.
>         * elf.c (elfcore_grok_pstatus): Add prototype.
>         (elfcore_grok_lwpstatus): Add prototype.
>         (elfcore_write_lwpstatus): New function.
>         (elfcore_write_pstatus): Fix typo, eliminate unnecessary memcpy.

Approved please apply.

Cheers
        Nick