cmake HAVE_CONTRIB examples

john30/ebusd src/ebusd/CMakeLists.txt :31 

endif(HAVE_CONTRIB)

john30/ebusd src/lib/ebus/CMakeLists.txt :20 

endif(HAVE_CONTRIB)

john30/ebusd src/lib/ebus/test/CMakeLists.txt :5 

endif(HAVE_CONTRIB)