[Avila] RedBoot remote GDB support

[Mike Playle]

Mike Playle wrote:
> Hi all
> 
> I've been told by a colleague that the Avila board's RedBoot
> bootloader allows you to attach a remote debugger to a running board
> after it's been booted up, with no physical access to the board (eg
> when it's been mounted at the top of an antenna pole).

For avoidance of doubt I should mention that (a) we're running Linux
and (b) I'm asking specifically about RedBoot, not any debugging
support that the application might have.

Mike