Build scripting plugins for Gerrit v3.{1,2}

Change-Id: I5920d8d824270eb23e2d89565e909e7f8282b3c2
diff --git a/jenkins/gerrit-bazel-plugin-groovy-provider.yaml b/jenkins/gerrit-bazel-plugin-groovy-provider.yaml
index 919233b..a394003 100644
--- a/jenkins/gerrit-bazel-plugin-groovy-provider.yaml
+++ b/jenkins/gerrit-bazel-plugin-groovy-provider.yaml
@@ -6,6 +6,7 @@
             - master
           gerrit-branch:
             - master
+            - stable-3.2
             - stable-3.1
             - stable-3.0
             - stable-2.16
diff --git a/jenkins/gerrit-bazel-plugin-scala-provider.yaml b/jenkins/gerrit-bazel-plugin-scala-provider.yaml
index c379ed0..9143371 100644
--- a/jenkins/gerrit-bazel-plugin-scala-provider.yaml
+++ b/jenkins/gerrit-bazel-plugin-scala-provider.yaml
@@ -6,5 +6,7 @@
             - master
           gerrit-branch:
             - master
+            - stable-3.2
+            - stable-3.1
             - stable-3.0
             - stable-2.16