cmake OPENSUBDIV_HAS_OPENCL examples

PixarAnimationStudios/OpenSubdiv opensubdiv/CMakeLists.txt :436 

target_compile_definitions(${osd_target} INTERFACE OPENSUBDIV_HAS_OPENCL)

lighttransport/tinyusdz src/osd/opensubdiv/CMakeLists.txt :408 

target_compile_definitions(${osd_target} INTERFACE OPENSUBDIV_HAS_OPENCL)