message: Flush stderr after we write to it when we're asserting.
diff: @@ -65,6 +65,7 @@ void Fail(const char* condition, const char* file, int line, const char* message
  #endif // _WIN32
  std::fprintf(stderr, buffer);
  + std::fflush(stderr);
  bool skipCrash = false;
  bool skipBreak = false;
  