Populating /usr/tests

[Simon J. Gerraty]

Thanks Julio, looks good.

I don't see anything that would cause us grief.
Internally we are using the meta mode build
(svn.freebsd.org/base/projects/bmake) so no tree walks, multiple passes etc.

We have all the tests from netbsd building with the tests located with
the relevant apps/libs as in the libcrypt case.   
We've not yet finished fixing them all to pass on freebsd though.