Cross-build its-base for Gerrit 2.14/master

Change-Id: I49ab3462d81a1bf79c5027887f6692be97500c60
diff --git a/jenkins/gerrit-buck-bazel-plugin-its-base.yaml b/jenkins/gerrit-buck-bazel-plugin-its-base.yaml
index a556401..8e265a5 100644
--- a/jenkins/gerrit-buck-bazel-plugin-its-base.yaml
+++ b/jenkins/gerrit-buck-bazel-plugin-its-base.yaml
@@ -7,7 +7,10 @@
             - stable-2.12
             - stable-2.11
             - stable-2.10
-      - 'plugin-{name}-bazel-{branch}':
+      - 'plugin-{name}-bazel-{branch}-{gerrit-branch}':
           branch:
-            - stable-2.14
             - master
+          gerrit-branch:
+            - master
+            - stable-2.14
+          targets: 'plugins/its-base:its-base plugins/its-base:its_base_tests'