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/bazlets.bzl b/app/gerrit/gerrit-oauth-provider/bazlets.bzl
new file mode 100644
index 0000000..f089af4
--- /dev/null
+++ b/app/gerrit/gerrit-oauth-provider/bazlets.bzl
@@ -0,0 +1,18 @@
+load("@bazel_tools//tools/build_defs/repo:git.bzl", "git_repository")
+
+NAME = "com_googlesource_gerrit_bazlets"
+
+def load_bazlets(
+        commit,
+        local_path = None):
+    if not local_path:
+        git_repository(
+            name = NAME,
+            remote = "https://gerrit.googlesource.com/bazlets",
+            commit = commit,
+        )
+    else:
+        native.local_repository(
+            name = NAME,
+            path = local_path,
+        )