Build lfs master against Gerrit stable-3.7

Change-Id: Ie2a3a64da6d0ac20d215db3648214ded44d1f672

jenkins/gerrit-bazel-plugin-lfs.yaml

diff --git a/jenkins/gerrit-bazel-plugin-lfs.yaml b/jenkins/gerrit-bazel-plugin-lfs.yaml
index 9f8dc34..5ae6ff0 100644
--- a/jenkins/gerrit-bazel-plugin-lfs.yaml
+++ b/jenkins/gerrit-bazel-plugin-lfs.yaml
@@ -6,6 +6,7 @@
             - master
           gerrit-branch:
             - master
+            - stable-3.7
             - stable-3.6
             - stable-3.5
             - stable-3.4