message: add missing MctsPlayer::Options logging
diff: @@ -35,6 +35,8 @@ std::ostream& operator<<(std::ostream& os, const MctsPlayer::Options& options) {
  << " random_symmetry:" << options.random_symmetry
  << " resign_threshold:" << options.game_options.resign_threshold
  << " resign_enabled:" << options.game_options.resign_enabled
  + << " value_init_penalty:" << options.value_init_penalty
  + << " policy_softmax_temp:" << options.policy_softmax_temp
  << " virtual_losses:" << options.virtual_losses
  << " komi:" << options.game_options.komi
  << " num_readouts:" << options.num_readouts
  