cmake rkcommon examples

RenderKit/ospray cmake/ospray_options.cmake :79 

find_package(rkcommon ${RKCOMMON_VERSION_REQUIRED} EXACT REQUIRED)

RenderKit/ospray-studio cmake/rkcommon.cmake :13 

find_package(rkcommon QUIET)

ospray/hdospray hdOSPRay/CMakeLists.txt :33 

find_package(rkcommon 1 REQUIRED
  PATHS ${rkcommon_DIR})