message: print error information, when the os is not supported
diff: @@ -63,6 +63,9 @@ then
  else
  export DYLD_LIBRARY_PATH="${PWD}/tensorflow:${DYLD_LIBRARY_PATH}"
  fi
  +else
  + echo "Only support Linux/Darwin, System $OS is not supported"
  + exit 1
  fi
  # Document the Go version and run tests
  