message: Update re2 library to 2018-10-01
  This fix updates re2 library to the latest release of 2018-10-01
diff: @@ -168,12 +168,12 @@ def tf_workspace(path_prefix = "", tf_repo_name = ""):
  tf_http_archive(
  name = "com_googlesource_code_re2",
  - sha256 = "803c7811146edeef8f91064de37c6f19136ff01a2a8cdb3230e940b2fd9f07fe",
  - strip_prefix = "re2-2018-07-01",
  + sha256 = "a31397714a353587413d307337d0b58f8a2e20e2b9d02f2e24e3463fa4eeda81",
  + strip_prefix = "re2-2018-10-01",
  system_build_file = clean_dep("//third_party/systemlibs:re2.BUILD"),
  urls = [
  - "https://mirror.bazel.build/github.com/google/re2/archive/2018-07-01.tar.gz",
  - "https://github.com/google/re2/archive/2018-07-01.tar.gz",
  + "https://mirror.bazel.build/github.com/google/re2/archive/2018-10-01.tar.gz",
  + "https://github.com/google/re2/archive/2018-10-01.tar.gz",
  ],
  )
  