The libstdc++ testsuite

[Benjamin Kosnik]

> When I made the first stl cleanup patch (removing dead code, etc), I spent
> enough time on stl_algo.h that I considered breaking it up into pieces.
> Then I realized that we don't spend enough time changing that file to
> really make it worth the effort.

Right. Phil's made a first pass at this.

> (Hmmm, maybe we don't spend much time in that file /because/ it's so huge.)

If y'all can come up with a better way I'm all ears.