message: Update re2 link to use the tar.gz link.
  Makefile build seems to want tar.gz links instead of the zip links
diff: @@ -181,12 +181,12 @@ def tf_workspace(path_prefix = "", tf_repo_name = ""):
  tf_http_archive(
  name = "com_googlesource_code_re2",
  - sha256 = "3a84203f0455ea86d8200098dbe45942ebabb7e374b4c363f74e4362a0aeaaa3",
  + sha256 = "d070e2ffc5476c496a6a872a6f246bfddce8e7797d6ba605a7c8d72866743bf9",
  strip_prefix = "re2-506cfa4bffd060c06ec338ce50ea3468daa6c814",
  system_build_file = clean_dep("//third_party/systemlibs:re2.BUILD"),
  urls = [
  - "http://mirror.tensorflow.org/github.com/google/re2/archive/506cfa4bffd060c06ec338ce50ea3468daa6c814.zip",
  - "https://github.com/google/re2/archive/506cfa4bffd060c06ec338ce50ea3468daa6c814.zip",
  + "http://mirror.tensorflow.org/github.com/google/re2/archive/506cfa4bffd060c06ec338ce50ea3468daa6c814.tar.gz",
  + "https://github.com/google/re2/archive/506cfa4bffd060c06ec338ce50ea3468daa6c814.tar.gz",
  ],
  )
  