[v3] make check-performance

[Benjamin Kosnik]

>Excellent!  I'll add support for this on the daily testers I control.

Make sure it works on BSD first....

Also, the abi testing bits for BSD are probably more important. I think
Andreas is going to do the 3.3.0 updates for various linux, but if you
could do the bsd4 and bsd5 baselines that would be cool. (There is a
problem with the new-abi-baseline file not producing a sorted symbol
file. I can't figure it out.)

best,
benjamin