message: Do not use mirror.tensorflow.org for TFLM flatbuffer download.
  Some users are reporting intermittent flakiness with the flatbuffer
  download from mirror.tensorflow.org
diff: @@ -91,7 +91,7 @@ if [ -d ${DOWNLOADED_FLATBUFFERS_PATH} ]; then
  echo >&2 "${DOWNLOADED_FLATBUFFERS_PATH} already exists, skipping the download."
  else
  ZIP_PREFIX="dca12522a9f9e37f126ab925fd385c807ab4f84e"
  - FLATBUFFERS_URL="http://mirror.tensorflow.org/github.com/google/flatbuffers/archive/${ZIP_PREFIX}.zip"
  + FLATBUFFERS_URL="https://github.com/google/flatbuffers/archive/${ZIP_PREFIX}.zip"
  FLATBUFFERS_MD5="aa9adc93eb9b33fa1a2a90969e48baee"
  TEMPDIR="$(mktemp -d)"
  