Update rules_closure to 0.4.2 (#12685)

WORKSPACE

@@ -2,11 +2,11 @@ workspace(name = "org_tensorflow")
 
 http_archive(
     name = "io_bazel_rules_closure",
-    sha256 = "bc41b80486413aaa551860fc37471dbc0666e1dbb5236fb6177cb83b0c105846",
-    strip_prefix = "rules_closure-dec425a4ff3faf09a56c85d082e4eed05d8ce38f",
+    sha256 = "25f5399f18d8bf9ce435f85c6bbf671ec4820bc4396b3022cc5dc4bc66303609",
+    strip_prefix = "rules_closure-0.4.2",
     urls = [
-        "http://mirror.bazel.build/github.com/bazelbuild/rules_closure/archive/dec425a4ff3faf09a56c85d082e4eed05d8ce38f.tar.gz",  # 2017-06-02
-        "https://github.com/bazelbuild/rules_closure/archive/dec425a4ff3faf09a56c85d082e4eed05d8ce38f.tar.gz",
+        "http://mirror.bazel.build/github.com/bazelbuild/rules_closure/archive/0.4.2.tar.gz",  # 2017-08-29
+        "https://github.com/bazelbuild/rules_closure/archive/0.4.2.tar.gz",
     ],
 )