RFC: Fix "break *EXP thread NUM"

[Joel Brobecker]

> I see that "task" is listed too now and should be added.  And the
> other parsers, including Ada, probably need similar work - except
> there I don't know how to do it.

I'm a little tied up at the moment, but I can take care of this.
You shouldn't feel obliged to help in this area.

It's strange, though, I thought that this was working already.
Ha! Just gave it a try, and indeed:

    (gdb) b *break_me'address task 3
    Error in expression, near `'.

Bummer!
-- 
Joel