cmake DOPENSUBDIV_HAS_OPENGL examples

PixarAnimationStudios/OpenSubdiv CMakeLists.txt :399 

add_definitions(
        -DOPENSUBDIV_HAS_OPENGL
    )

lighttransport/tinyusdz src/osd/CMakeLists.txt :369 

add_definitions(
        -DOPENSUBDIV_HAS_OPENGL
    )