cmake BOOST_COMPUTE_HAVE_OPENCV examples

fabsig/GPBoost external_libs/compute/CMakeLists.txt :58

option(BOOST_COMPUTE_HAVE_OPENCV "Have OpenCV" OFF)

Jackarain/proxy third_party/boost/libs/compute/CMakeLists.txt :108

option(BOOST_COMPUTE_HAVE_OPENCV "Have OpenCV" OFF)