[PATCH][gdb] Add me to write-after-approval section in MAINTAINERS

[Joel Brobecker]

> I've committed one patch modifying gdb ([gdb/cli] Honour 'print pretty' when
> printing result of finish command) and I'm covered by the Novell blanket
> copyright assignment.  So AFAIU, I qualify for write-after-approval.
> 
> This patch adds me to the MAINTAINERS file in the write-after-approval section.
> 
> OK for trunk?

Looks good! Normally, these patches are even considered obvious.
Welcome to our group! :)

-- 
Joel