fix unix tests.
fix unix tests.

scamille/simbody,simbody/simbody,elkingtonmcb/simbody,robojukie/simbody,Gjacquenot/simbody,Gjacquenot/simbody,simbody/simbody,Gjacquenot/simbody,robojukie/simbody,robojukie/simbody,scamille/simbody,elkingtonmcb/simbody,elkingtonmcb/simbody,scamille/simbody