cmake DOPENSUBDIV_HAS_TBB examples

PixarAnimationStudios/OpenSubdiv CMakeLists.txt :453 

add_definitions(
        -DOPENSUBDIV_HAS_TBB
        ${TBB_CXX_FLAGS}
    )

lighttransport/tinyusdz src/osd/CMakeLists.txt :423 

add_definitions(
        -DOPENSUBDIV_HAS_TBB
        ${TBB_CXX_FLAGS}
    )