Omit troublesome osx10.7+ suffix, go for just osx instead
Omit troublesome osx10.7+ suffix, go for just osx instead

staticfloat/julia-buildbot,kshyatt/julia-buildbot,yuyichao/julia-buildbot,staticfloat/julia-buildbot,kshyatt/julia-buildbot,yuyichao/julia-buildbot