[RFA] Update copyright dates in gdb.texinfo

[Michael Snyder]

Eli Zaretskii wrote:
>>Date: Fri, 31 Mar 2006 08:55:51 -0500
>>From: Daniel Jacobowitz <drow@false.org>
>>Cc: Michael Snyder <msnyder@redhat.com>, gdb-patches@sources.redhat.com
>>
>>
>>>Yes, thanks.  But I thought we all agreed that copyright years need to
>>>be changed only as part of preparing a release, and that at that time
>>>all files need to be stamped with the release year.  Did I miss
>>>something?
>>
>>Isn't it the other way around?
> 
> 
> I didn't think it was.
> 
> Anyone, this is nothing worth arguing about.
> 

Anyway, committed.
Thanks.