Require gerrit-bsl-license for building events-kafka plugin

Change-Id: I81bc143b491b8ae266ddd1a6dcde6312b92c02b3

jenkins/gerrit-bazel-plugin-events-kafka.yaml

diff --git a/jenkins/gerrit-bazel-plugin-events-kafka.yaml b/jenkins/gerrit-bazel-plugin-events-kafka.yaml
index bfacf45..55d1ed1 100644
--- a/jenkins/gerrit-bazel-plugin-events-kafka.yaml
+++ b/jenkins/gerrit-bazel-plugin-events-kafka.yaml
@@ -9,8 +9,11 @@
             - stable-3.12
       - 'plugin-{name}-gh-bazel-{branch}':
           branch:
+            - stable-3.13
+      - 'plugin-{name}-gh-bazel-{branch}':
+          extra-gh-repos: 'gerrit-bsl-license'
+          branch:
             - master
             - stable-3.14
-            - stable-3.13
       - 'plugin-{name}-verifier'
       - 'plugin-{name}-verifier-gh'