cmake DOPENSUBDIV_HAS_OPENMP examples

PixarAnimationStudios/OpenSubdiv CMakeLists.txt :437 

add_definitions(
        -DOPENSUBDIV_HAS_OPENMP
        ${OpenMP_CXX_FLAGS}
    )

lighttransport/tinyusdz src/osd/CMakeLists.txt :407 

add_definitions(
        -DOPENSUBDIV_HAS_OPENMP
        ${OpenMP_CXX_FLAGS}
    )