Build javamelody on Gerrit 2.15

Change-Id: Ib894557298ef1b5d61517f8f0bb4f999bb0d898f
diff --git a/jenkins/gerrit-buck-bazel-plugin-javamelody.yaml b/jenkins/gerrit-buck-bazel-plugin-javamelody.yaml
index 9b3aa01..8ec644a 100644
--- a/jenkins/gerrit-buck-bazel-plugin-javamelody.yaml
+++ b/jenkins/gerrit-buck-bazel-plugin-javamelody.yaml
@@ -29,6 +29,7 @@
           branch:
             - master
             - stable-2.14
+            - stable-2.15
           targets: >
             plugins/javamelody:javamelody-deps_deploy.jar
             plugins/javamelody:javamelody \