Hi!

Some packages like libffi, gcc support extended, slower versions of
their testsuites. In the past, I've seen both USE="expensive-tests" (I
think) and USE="test-full" (used in a few places in-tree atm) for this.

I sort of hate both suggestions but I'm open to what people think is
best, with a view to then making it a global USE flag then? Thoughts?

Note that I _do_ think there's value in exposing these because some of
the configurations I use, and I know others are deploying Gentoo for,
are where they want to make use of as many opportunities as possible
to find bad runtime behaviour (kernel and toolchain patching).

thanks,
sam