[patch] Use the string returned by pretty printer for MI varobjs instead of "{...}"

[xgsa]

Tom, it seems you are here. Please, look through this path when you have 
time.

Thanks,
Anton.

-------- Original message --------
>> Ping! Please, review the patch.
> I tried, a couple of times. But in the end, I couldn't find enough
> time to understand that part of the code and approve. My guess
> is that Tom has the best knowlege of the area. I'd wait until
> he comes back...
>