Solaris fixes for a few tests

[Alexis S. L. Carvalho]

Thus spake Giorgos Keramidas:
> On 2006-10-18 16:03, Danek Duvall <danek.duvall at sun.com> wrote:
> > I can't speak for BSD, but on Solaris, /bin is simply a symlink to
> > /usr/bin, so /usr/bin/test would be fine.  As would explicit -f/-d tests,
> > if Alexis is comfortable with that; I didn't want to change the semantics
> > that way without the original author's approval.
> 
> I'd probably prefer -d/-f tests -- at least from a portability perspective.
> On FreeBSD (probably other BSD's too), /bin is not a symlink to /usr/bin.

I've pushed a version with -d/-f to the crew repo.

Alexis