Download delete-project from its own stable-2.16 branch

The delete-project plugin has now a specific stable-2.16 branch and
thus the jar needs to be download form its own specific stable job.

Change-Id: I319ba871a45b02861f64f97c59e35c4b31ea9935
diff --git a/fpm/Makefile b/fpm/Makefile
index be4c7cc..6404772 100644
--- a/fpm/Makefile
+++ b/fpm/Makefile
@@ -27,7 +27,7 @@
   plugin-plugin-manager-bazel-master-stable-2.16/lastSuccessfulBuild/artifact/bazel-genfiles/plugins/plugin-manager/plugin-manager.jar \
   plugin-avatars-gravatar-bazel-master-stable-2.16/lastSuccessfulBuild/artifact/bazel-genfiles/plugins/avatars-gravatar/avatars-gravatar.jar \
   plugin-gitiles-bazel-master-stable-2.16/lastSuccessfulBuild/artifact/bazel-genfiles/plugins/gitiles/gitiles.jar \
-  plugin-delete-project-bazel-master-stable-2.16/lastSuccessfulBuild/artifact/bazel-genfiles/plugins/delete-project/delete-project.jar \
+  plugin-delete-project-bazel-stable-2.16/lastSuccessfulBuild/artifact/bazel-genfiles/plugins/delete-project/delete-project.jar \
   plugin-uploadvalidator-bazel-stable-2.16/lastSuccessfulBuild/artifact/bazel-genfiles/plugins/uploadvalidator/uploadvalidator.jar
 
 RPM_OUT=$(OUT)/gerrit-$(VERSION)-$(RELEASE).$(BUILD_ARCH).rpm