Added -pthread link flag to coreLibrary to allows C++ tests to run
Added -pthread link flag to coreLibrary to allows C++ tests to run


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