app/gerrit: import OAuth provider and add SSO support

This change:

 - imports gerrit-oauth-provider from upstream
 - adds sso.hackerspae.pl support to it

Change-Id: I92e7053614a9297bf1ced3aac044c0002acd836a
diff --git a/app/gerrit/gerrit-oauth-provider/tools/bzl/plugin.bzl b/app/gerrit/gerrit-oauth-provider/tools/bzl/plugin.bzl
new file mode 100644
index 0000000..4d2dbdd
--- /dev/null
+++ b/app/gerrit/gerrit-oauth-provider/tools/bzl/plugin.bzl
@@ -0,0 +1,10 @@
+load(
+    "@com_googlesource_gerrit_bazlets//:gerrit_plugin.bzl",
+    _gerrit_plugin = "gerrit_plugin",
+    _plugin_deps = "PLUGIN_DEPS",
+    _plugin_test_deps = "PLUGIN_TEST_DEPS",
+)
+
+gerrit_plugin = _gerrit_plugin
+PLUGIN_DEPS = _plugin_deps
+PLUGIN_TEST_DEPS = _plugin_test_deps