message: Update rules_closure data
diff: @@ -8,7 +8,7 @@ http_archive(
  strip_prefix = "rules_closure-316e6133888bfc39fb860a4f1a31cfcbae485aef",
  urls = [
  "https://mirror.bazel.build/github.com/bazelbuild/rules_closure/archive/316e6133888bfc39fb860a4f1a31cfcbae485aef.tar.gz",
  - "https://github.com/bazelbuild/rules_closure/archive/316e6133888bfc39fb860a4f1a31cfcbae485aef.tar.gz", # 2018-12-21
  + "https://github.com/bazelbuild/rules_closure/archive/316e6133888bfc39fb860a4f1a31cfcbae485aef.tar.gz", # 2019-03-21
  ],
  )
  