message: Update snappy library to 1.1.8
  The previous snappy version (1.1.7) is really old (2017). For
  that reason it makes sense to update snappy to 1.1.8 which was
  released in 2020.
diff: @@ -744,12 +744,12 @@ def tf_repositories(path_prefix = "", tf_repo_name = ""):
  tf_http_archive(
  name = "snappy",
  build_file = clean_dep("//third_party:snappy.BUILD"),
  - sha256 = "3dfa02e873ff51a11ee02b9ca391807f0c8ea0529a4924afa645fbf97163f9d4",
  - strip_prefix = "snappy-1.1.7",
  + sha256 = "16b677f07832a612b0836178db7f374e414f94657c138e6993cbfc5dcc58651f",
  + strip_prefix = "snappy-1.1.8",
  system_build_file = clean_dep("//third_party/systemlibs:snappy.BUILD"),
  urls = [
  - "https://storage.googleapis.com/mirror.tensorflow.org/github.com/google/snappy/archive/1.1.7.tar.gz",
  - "https://github.com/google/snappy/archive/1.1.7.tar.gz",
  + "https://storage.googleapis.com/mirror.tensorflow.org/github.com/google/snappy/archive/1.1.8.tar.gz",
  + "https://github.com/google/snappy/archive/1.1.8.tar.gz",
  ],
  )
  