message: Fix preprocessor test
diff: @@ -47,7 +47,7 @@ private:
  ostream& LogStream::flush() noexcept {
  Buffer& buf = getBuffer();
  -#if ANDROID
  +#ifdef __ANDROID__
  switch (mPriority) {
  case LOG_DEBUG:
  __android_log_write(ANDROID_LOG_DEBUG, UTILS_LOG_TAG, buf.get());
  