Build audit-sl4j plugin for Gerrit v3.2

Change-Id: Ia1ba33abbc80a0667e8bd72ea1a13b40b7c67da6
diff --git a/jenkins/gerrit-bazel-plugin-audit-sl4j.yaml b/jenkins/gerrit-bazel-plugin-audit-sl4j.yaml
index 8f010c3..b0446c0 100644
--- a/jenkins/gerrit-bazel-plugin-audit-sl4j.yaml
+++ b/jenkins/gerrit-bazel-plugin-audit-sl4j.yaml
@@ -6,6 +6,7 @@
             - master
           gerrit-branch:
             - master
+            - stable-3.2
             - stable-3.1
       - 'plugin-{name}-bazel-{branch}':
           branch: