Bazel: Update rules_closure to make it forward compatible

Gerrit cannot be built any more with upcoming Bazel 0.21 release.
That's because rules_closure depends on outdated protobuf version,
that uses some Bazel features that were discontinued in upcoming
Bazel 0.21 release.

Update rules_closure, so that we can upgrade Bazel and build gerrit
without passing this incompatible option:

  --incompatible_package_name_is_a_function=false

Bug: Issue 10112
Change-Id: I826471cce7c6a248838a466c458c228eb0a6b5d9

gerrit_polymer.bzl

@@ -3,9 +3,9 @@ load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive", "http_file"
 def gerrit_polymer():
     native.http_archive(
         name = "io_bazel_rules_closure",
-        sha256 = "4dd84dd2bdd6c9f56cb5a475d504ea31d199c34309e202e9379501d01c3067e5",
-        strip_prefix = "rules_closure-3103a773820b59b76345f94c231cb213e0d404e2",
-        urls = ["https://github.com/bazelbuild/rules_closure/archive/3103a773820b59b76345f94c231cb213e0d404e2.tar.gz"],
+        sha256 = "d797d2410358bc8a4ceb1d26319b899acf4201f39cf2a99eb4b57212c01d76c7",
+        strip_prefix = "rules_closure-a34455e0c76769df13d25b67851252559fe7f83d",
+        urls = ["https://github.com/bazelbuild/rules_closure/archive/a34455e0c76769df13d25b67851252559fe7f83d.tar.gz"],
     )
 
     # File is specific to Polymer and copied from the Closure Github -- should be