cmake HAVE_PROTOBUF examples

SsageParuders/Android_Native_Surface my_android_opencv/modules/dnn/CMakeLists.txt :93 

add_definitions(-DHAVE_PROTOBUF=1)

joachimBurket/esp32-opencv modules/dnn/CMakeLists.txt :59 

add_definitions(-DHAVE_PROTOBUF=1)