Build admin-console for Gerrit v2.15

Change-Id: Idd30148517f2573b7d08e67a871c4d6ad40c8ae1
diff --git a/jenkins/gerrit-buck-bazel-plugin-admin-console.yaml b/jenkins/gerrit-buck-bazel-plugin-admin-console.yaml
index 7895947..78bd3f6 100644
--- a/jenkins/gerrit-buck-bazel-plugin-admin-console.yaml
+++ b/jenkins/gerrit-buck-bazel-plugin-admin-console.yaml
@@ -10,4 +10,5 @@
       - 'plugin-{name}-bazel-{branch}':
           branch:
             - master
+            - stable-2.15
             - stable-2.14