Make transitive starlark loads explicit

This fixes the build with bazel 0.25.

Bug: Issue 10855
Change-Id: I480b5a929a48ce327daf95d7f74e167e50aeed6d

WORKSPACE

diff --git a/WORKSPACE b/WORKSPACE
index 51274d3..ddb0e3e 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,7 +3,7 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "298b25cf8c5ef0f27caa215cbc128e530f68d9f4",
+    commit = "51049da0140c58ee26f8285bca4393c5e43ce4a1",
     #local_path = "/home/<user>/projects/bazlets",
 )
 

tools/bzl/classpath.bzl

diff --git a/tools/bzl/classpath.bzl b/tools/bzl/classpath.bzl
index d5764f7..c921d01 100644
--- a/tools/bzl/classpath.bzl
+++ b/tools/bzl/classpath.bzl
@@ -1,4 +1,6 @@
 load(
     "@com_googlesource_gerrit_bazlets//tools:classpath.bzl",
-    "classpath_collector",
+    _classpath_collector = "classpath_collector",
 )
+
+classpath_collector = _classpath_collector

tools/bzl/plugin.bzl

diff --git a/tools/bzl/plugin.bzl b/tools/bzl/plugin.bzl
index c157125..89a1643 100644
--- a/tools/bzl/plugin.bzl
+++ b/tools/bzl/plugin.bzl
@@ -1,5 +1,8 @@
 load(
     "@com_googlesource_gerrit_bazlets//:gerrit_plugin.bzl",
-    "PLUGIN_DEPS",
-    "gerrit_plugin",
+    _gerrit_plugin = "gerrit_plugin",
+    _plugin_deps = "PLUGIN_DEPS",
 )
+
+gerrit_plugin = _gerrit_plugin
+PLUGIN_DEPS = _plugin_deps