Build uploadvalidator plugin on stable-3.6

Change-Id: Ifc8a7da1cc43b193256900a97d5d08f0c1cd7b18
diff --git a/jenkins/gerrit-bazel-plugin-uploadvalidator.yaml b/jenkins/gerrit-bazel-plugin-uploadvalidator.yaml
index 5f4e07f..595d54b 100644
--- a/jenkins/gerrit-bazel-plugin-uploadvalidator.yaml
+++ b/jenkins/gerrit-bazel-plugin-uploadvalidator.yaml
@@ -7,3 +7,8 @@
             - stable-3.5
             - stable-3.4
             - stable-3.3
+      - 'plugin-{name}-bazel-{branch}-{gerrit-branch}':
+          branch:
+            - master
+          gerrit-branch:
+            - stable-3.6