[3.3, 3.4, HEAD] Include baseline used for libstdc++-v3 abi check in test summary

[Matthias Klose]

Paolo Carlini writes:
> Mark Mitchell wrote:
> 
> >> Any reason not to checkin?
> >
> > Not from me, but this is up to the V3 folks.
> 
> ... too easy ;)
> 
> Seriously, the change actually belongs to contrib, *not* a directory 
> under libstdc++-v3,
> therefore I (we, in my opinion) can't really approve it.

I did expect this kind of discussion :-( (or maybe ;-) ), therefore
the negated question. The only people affected by this change is/are
the V3 nitpicker(s) ;)

	Matthias