Build reviewers-by-blame for Gerrit 3.{1,2}

Change-Id: I0354c14a8aa12259c9629511457bbbe33a0b2c95
diff --git a/jenkins/gerrit-bazel-plugin-reviewers-by-blame.yaml b/jenkins/gerrit-bazel-plugin-reviewers-by-blame.yaml
index 12e209a..82eecc4 100644
--- a/jenkins/gerrit-bazel-plugin-reviewers-by-blame.yaml
+++ b/jenkins/gerrit-bazel-plugin-reviewers-by-blame.yaml
@@ -3,6 +3,12 @@
     jobs:
       - 'plugin-{name}-bazel-{branch}':
           branch:
-            - master
             - stable-3.0
             - stable-2.16
+      - 'plugin-{name}-bazel-{branch}-{gerrit-branch}':
+          branch:
+            - master
+          gerrit-branch:
+            - master
+            - stable-3.2
+            - stable-3.1