message: gltfpack: Silence basisu output
  This tool is incredibly verbose so we pipe the entire output to
  /dev/null. This tool is also incredibly slow so we print a line before
  each texture is being compressed...
diff: @@ -2736,6 +2736,14 @@ bool writeBasisImage(std::string& json, const char* path, bool normal_map, const
  cmd += " -output_file ";
  cmd += basis_full_path;
  +#ifdef _WIN32
  + cmd += " >nul";
  +#else
  + cmd += " >/dev/null";
  +#endif
  +
  + printf("Compressing %s to %s\n", full_path.c_str(), basis_full_path.c_str());
  +
  if (system(cmd.c_str()) != 0)
  return false;
  