Build reviewassistant on 3.2 branch

Change-Id: I63c6ab2af3a7c99cc655a29afaf020b68bfa1d83
diff --git a/jenkins/gerrit-bazel-plugin-reviewassistant.yaml b/jenkins/gerrit-bazel-plugin-reviewassistant.yaml
index 4b9537d..6fd50ed 100644
--- a/jenkins/gerrit-bazel-plugin-reviewassistant.yaml
+++ b/jenkins/gerrit-bazel-plugin-reviewassistant.yaml
@@ -4,5 +4,6 @@
       - 'plugin-{name}-bazel-{branch}':
           branch:
             - master
+            - stable-3.2
             - stable-3.1
             - stable-2.16