message: Silence messages from protobuf cmake
diff: @@ -7,6 +7,12 @@ set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
  find_package(Threads REQUIRED)
  +function(message)
  + if(NOT MESSAGE_QUIET)
  + _message(${ARGN})
  + endif()
  +endfunction()
  +
  option(PROFILE_TESTS "Profile tests" OFF)
  set(PYTHON unbuffer python3)
  @@ -188,7 +194,9 @@ include(${CCF_DIR}/cmake/crypto.cmake)
  include(${CCF_DIR}/cmake/quickjs.cmake)
  include(${CCF_DIR}/cmake/sss.cmake)
  include(${CCF_DIR}/cmake/nghttp2.cmake)
  +set(MESSAGE_QUIET ON)
  include(${CCF_DIR}/cmake/protobuf.cmake)
  +unset(MESSAGE_QUIET)
  # Unit test wrapper
  function(add_unit_test name)
  