Require gerrit-bsl-license for building git-repo-metrics plugin

Change-Id: I0872f91fc7d712545b6c8437a3452547711c880a

jenkins/gerrit-bazel-plugin-git-repo-metrics.yaml

diff --git a/jenkins/gerrit-bazel-plugin-git-repo-metrics.yaml b/jenkins/gerrit-bazel-plugin-git-repo-metrics.yaml
index ea0c626..05a7b82 100644
--- a/jenkins/gerrit-bazel-plugin-git-repo-metrics.yaml
+++ b/jenkins/gerrit-bazel-plugin-git-repo-metrics.yaml
@@ -5,8 +5,11 @@
     jobs:
       - 'plugin-{name}-gh-bazel-{branch}':
           branch:
-            - master
             - stable-3.13
+      - 'plugin-{name}-gh-bazel-{branch}':
+          extra-gh-repos: 'gerrit-bsl-license'
+          branch:
+            - master
             - stable-3.14
       - 'plugin-{name}-bazel-{branch}-{gerrit-branch}':
           branch: