message: Clarify the state of third_party/com_google_absl.patch
diff: @@ -157,8 +157,13 @@ def tf_repositories(path_prefix = "", tf_repo_name = ""):
  tf_http_archive(
  name = "com_google_absl",
  build_file = clean_dep("//third_party:com_google_absl.BUILD"),
  - # TODO: Remove patch #1 when https://github.com/abseil/abseil-cpp/issues/326 is resolved.
  - # Patch #2 needs to stay until we have a better control over which symbols to export.
  + # TODO: Remove everything but the patch to absl/time/BUILD.bazel when
  + # https://github.com/abseil/abseil-cpp/issues/326 is resolved.
  + # The patch to absl/time/BUILD.bazel serves to export absl symbols, as changes
  + # on Bazel side (https://github.com/bazelbuild/bazel/issues/7362) caused the linker
  + # to not link the whole library by default (see
  + # https://github.com/tensorflow/addons/issues/663).
  + # We can get rid of it once we have mechanism to control which symbols to export.
  patch_file = clean_dep("//third_party:com_google_absl.patch"),
  sha256 = "acd93f6baaedc4414ebd08b33bebca7c7a46888916101d8c0b8083573526d070",
  strip_prefix = "abseil-cpp-43ef2148c0936ebf7cb4be6b19927a9d9d145b8f",
  