Fixed SceneCache build problem on OS X.
Fixed SceneCache build problem on OS X.

goddardl/cortex,goddardl/cortex,goddardl/cortex,appleseedhq/cortex,lento/cortex,davidsminor/cortex,lento/cortex,appleseedhq/cortex,davidsminor/cortex,appleseedhq/cortex,hradec/cortex,lento/cortex,hradec/cortex,davidsminor/cortex,davidsminor/cortex,hradec/cortex