[patch] readelf --debug-dump=gdb_index support for v4

[Nick Clifton]

Hi Jan,

> binutils/
> 2011-01-25  Jan Kratochvil<jan.kratochvil@redhat.com>
> 	Doug Evans<dje@google.com>
>
> 	* dwarf.c (display_gdb_index): Support version 4, warn on version 3.

Approved - please apply.

Cheers
   Nick