Adding Self to gdb/MAINTAINERS

[Joel Brobecker]

> It has been suggested that I add myself to gdb/MAINTAINERS with write
> after approval so I can help out with the simulators and *-rtems*
> configurations.

The only requirement is that you submit one good patch, and I found
one that was committed in Aug 2006.

> Is that OK with everyone? 

So, please go ahead (do not forget to post the patch you'll end up
checking in).

(I double-checked that the copyright assignment is still in place)

-- 
Joel