Build reparent and wip plugins on stable-2.13

Change-Id: I431025e1537d3445694f96a9e9c800ae145e7636
diff --git a/jenkins/gerrit-buck-bazel-plugin-reparent.yaml b/jenkins/gerrit-buck-bazel-plugin-reparent.yaml
index 6ab26d4..b0044b0 100644
--- a/jenkins/gerrit-buck-bazel-plugin-reparent.yaml
+++ b/jenkins/gerrit-buck-bazel-plugin-reparent.yaml
@@ -1,6 +1,9 @@
 - project:
     name: reparent
     jobs:
+      - 'plugin-{name}-{branch}':
+          branch:
+            - stable-2.13
       - 'plugin-{name}-bazel-{branch}':
           branch:
             - master
diff --git a/jenkins/gerrit-buck-bazel-plugin-wip.yaml b/jenkins/gerrit-buck-bazel-plugin-wip.yaml
index e21fc82..488c22d 100644
--- a/jenkins/gerrit-buck-bazel-plugin-wip.yaml
+++ b/jenkins/gerrit-buck-bazel-plugin-wip.yaml
@@ -3,6 +3,7 @@
     jobs:
       - 'plugin-{name}-{branch}':
           branch:
+            - stable-2.13
             - stable-2.12
       - 'plugin-{name}-bazel-{branch}':
           branch: