[RFC 3/3] Test on solib load and unload

[Tom Tromey]

Doug> I like tests that leave things behind afterwards so that if I want to
Doug> run things by hand afterwards I can easily do so.

Yes, that's definitely good.

Doug> Let "make clean" clean up build artifacts.
Doug> [Our testsuite "make clean" rules are always lagging behind, but with some
Doug> conventions in the perf testsuite we can make this a tractable problem.

I really dislike the "make clean" rules, mostly because they mean
maintaining a huge number of Makefiles just for this one purpose.

In GDB_PARALLEL mode, "make clean" works by zapping a few
directories... much nicer :-).  On my branch I removed all those
Makefiles too.  I'm curious whether I ought to try to upstream this.

Tom