message: nsync update: portability fixes for MacOS, s390x.
diff: @@ -429,11 +429,11 @@ def tf_workspace(path_prefix="", tf_repo_name=""):
  native.http_archive(
  name = "nsync",
  urls = [
  - "https://mirror.bazel.build/github.com/google/nsync/archive/ad722c76c6e6653f66be2e1f69521b7f7517da55.tar.gz",
  - # "https://github.com/google/nsync/archive/ad722c76c6e6653f66be2e1f69521b7f7517da55.tar.gz",
  + "https://mirror.bazel.build/github.com/google/nsync/archive/839fcc53ff9be58218ed55397deb3f8376a1444e.tar.gz",
  + # "https://github.com/google/nsync/archive/839fcc53ff9be58218ed55397deb3f8376a1444e.tar.gz",
  ],
  - sha256 = "7dd8ca49319f77e8226cd020a9210a525f88ac26e7041c59c95418223a1cdf55",
  - strip_prefix = "nsync-ad722c76c6e6653f66be2e1f69521b7f7517da55",
  + sha256 = "124d105edb0313ef2d7f5bb86ec94d9f8de95479e55641c4254ffa8f795e9b37",
  + strip_prefix = "nsync-839fcc53ff9be58218ed55397deb3f8376a1444e",
  )
  native.http_archive(
  