cmake DQTAV_HAVE_ examples

wang-bin/QtAV src/CMakeLists.txt :196 

ADD_DEFINITIONS(-DQTAV_HAVE_${D}=1)

wang-bin/QtAV src/CMakeLists.txt :511 

target_compile_definitions(${MODULE} PRIVATE -DQTAV_HAVE_${PKG_CONFIG_MODULE}=1)