Build the LFS plugin on stable-3.0

Change-Id: I377c49ad7fc93d9ac5ebe49811ba6cf56dae63b5
diff --git a/jenkins/gerrit-buck-bazel-plugin-lfs.yaml b/jenkins/gerrit-buck-bazel-plugin-lfs.yaml
index d56f259..1c0f7d0 100644
--- a/jenkins/gerrit-buck-bazel-plugin-lfs.yaml
+++ b/jenkins/gerrit-buck-bazel-plugin-lfs.yaml
@@ -7,6 +7,7 @@
       - 'plugin-{name}-bazel-{branch}':
           branch:
             - master
+            - stable-3.0
             - stable-2.16
             - stable-2.15
             - stable-2.14