Bug 579808: Enable signing in release script

releng/Jenkinsfile

diff --git a/releng/Jenkinsfile b/releng/Jenkinsfile
index 8c4c191..43a9482 100644
--- a/releng/Jenkinsfile
+++ b/releng/Jenkinsfile
@@ -28,7 +28,7 @@
           if(params.MODE == 'Milestone') {
             build.set_milestone(params.MILESTONE_VERSION)
           }
-          build.build_and_test(false)
+          build.build_and_test(true)
         }
       }
     }