message: Bump ABSL dependency to latest stable released version.
  Bumps to Abseil LTS branch, Sept 2020, Patch 3
diff: @@ -6,8 +6,8 @@ def repo():
  """Imports absl."""
  # Attention: tools parse and update these lines.
  - ABSL_COMMIT = "b56cbdd23834a65682c0b46f367f8679e83bc894"
  - ABSL_SHA256 = "6eb8a1c4e29a1e1fa9f13eacb493fbc5c40d044658fe99eb46afb6297c5760f2"
  + ABSL_COMMIT = "6f9d96a1f41439ac172ee2ef7ccd8edf0e5d068c"
  + ABSL_SHA256 = "62c27e7a633e965a2f40ff16b487c3b778eae440bab64cad83b34ef1cbe3aa93"
  tf_http_archive(
  name = "com_google_absl",
  