[v3] testsuite docs

[Mark Mitchell]

Benjamin Kosnik wrote:
> This patch updates the libstdc++ testing docs. Not included is how to
> test an installed compiler: I cannot quite get this to work using the
> formula that Mark detailed last month. I'm hoping that when that become possible, he'll update the docs.

I'll look into that...

> I'm seriously considering making libv3test based on check-local, not via
> noinst_LIBRARY. That might be the cleanest way to do this bit, and avoid
> the current dejagnu/make duplication. 

That's not what we want for testing installed tree.  (Remember: there 
are no Makefiles at that point!)  The right fix is to move anything that 
wants libv3test into DejaGNU.

I'll get to check-compile/check-performance soon.

-- 
Mark Mitchell
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