message: Change speexdsp download to GitHub
  xiph.org appears to be down so change to GitHub (presumably more stable).
diff: @@ -884,11 +884,11 @@ http_archive(
  http_archive(
  name = "speexdsp",
  build_file = "//third_party:speexdsp.BUILD",
  - sha256 = "682042fc6f9bee6294ec453f470dadc26c6ff29b9c9e9ad2ffc1f4312fd64771",
  - strip_prefix = "speexdsp-1.2.0",
  + sha256 = "d7032f607e8913c019b190c2bccc36ea73fc36718ee38b5cdfc4e4c0a04ce9a4",
  + strip_prefix = "speexdsp-SpeexDSP-1.2.0",
  urls = [
  - "https://storage.googleapis.com/mirror.tensorflow.org/downloads.xiph.org/releases/speex/speexdsp-1.2.0.tar.gz",
  - "https://downloads.xiph.org/releases/speex/speexdsp-1.2.0.tar.gz",
  + "https://storage.googleapis.com/mirror.tensorflow.org/github.com/xiph/speexdsp/archive/SpeexDSP-1.2.0.tar.gz",
  + "https://github.com/xiph/speexdsp/archive/SpeexDSP-1.2.0.tar.gz",
  ],
  )
  