Build egit plugin for Gerrit v3.2

Change-Id: I5490516dbddc83372cd67f4300b64373dee018ea
diff --git a/jenkins/gerrit-bazel-plugin-egit.yaml b/jenkins/gerrit-bazel-plugin-egit.yaml
index 3005f17..70a0ab3 100644
--- a/jenkins/gerrit-bazel-plugin-egit.yaml
+++ b/jenkins/gerrit-bazel-plugin-egit.yaml
@@ -6,5 +6,7 @@
             - master
           gerrit-branch:
             - master
+            - stable-3.2
+            - stable-3.1
             - stable-3.0
             - stable-2.16