Update dependency on rules_closure

This makes this command succeed:
  bazel build //tensorflow/tools/pip_package:build_pip_package --incompatible_disallow_data_transition

This is needed for a future change in Bazel.

WORKSPACE

@@ -4,11 +4,11 @@ load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive", "http_file"
 
 http_archive(
     name = "io_bazel_rules_closure",
-    sha256 = "a38539c5b5c358548e75b44141b4ab637bba7c4dc02b46b1f62a96d6433f56ae",
-    strip_prefix = "rules_closure-dbb96841cc0a5fb2664c37822803b06dab20c7d1",
+    sha256 = "43c9b882fa921923bcba764453f4058d102bece35a37c9f6383c713004aacff1",
+    strip_prefix = "rules_closure-9889e2348259a5aad7e805547c1a0cf311cfcd91",
     urls = [
-        "https://mirror.bazel.build/github.com/bazelbuild/rules_closure/archive/dbb96841cc0a5fb2664c37822803b06dab20c7d1.tar.gz",
-        "https://github.com/bazelbuild/rules_closure/archive/dbb96841cc0a5fb2664c37822803b06dab20c7d1.tar.gz",  # 2018-04-13
+        "https://mirror.bazel.build/github.com/bazelbuild/rules_closure/archive/9889e2348259a5aad7e805547c1a0cf311cfcd91.tar.gz",
+        "https://github.com/bazelbuild/rules_closure/archive/9889e2348259a5aad7e805547c1a0cf311cfcd91.tar.gz",  # 2018-12-21
     ],
 )