Build code-owners plugin on stable-3.3

Also raise the maximum build time to 60 minutes,
because the code-owners has quite a number of slow
tests.

Change-Id: I95ba3495af19ab37ffd390d00f46aa4d57087303
diff --git a/jenkins/gerrit-bazel-plugin-code-owners.yaml b/jenkins/gerrit-bazel-plugin-code-owners.yaml
index 2d5d467..0be73dd 100644
--- a/jenkins/gerrit-bazel-plugin-code-owners.yaml
+++ b/jenkins/gerrit-bazel-plugin-code-owners.yaml
@@ -6,3 +6,4 @@
             - master
           gerrit-branch:
             - master
+            - stable-3.3
diff --git a/jenkins/gerrit-bazel-plugin-template.yaml b/jenkins/gerrit-bazel-plugin-template.yaml
index 0f7cf46..1a50032 100644
--- a/jenkins/gerrit-bazel-plugin-template.yaml
+++ b/jenkins/gerrit-bazel-plugin-template.yaml
@@ -3,7 +3,7 @@
     targets: 'plugins/{name}:{name}'
     wrappers:
       - timeout:
-          timeout: 30
+          timeout: 60
           fail: true
       - timestamps
       - credentials-binding: