don't require test results on cord-workflow-probe

Change-Id: Ifb3fa896f1f12a75384b2a6b4339f20aaf712f77
diff --git a/jjb/verify/cord-workflow-probe.yaml b/jjb/verify/cord-workflow-probe.yaml
index ccd3833..77703f1 100644
--- a/jjb/verify/cord-workflow-probe.yaml
+++ b/jjb/verify/cord-workflow-probe.yaml
@@ -19,3 +19,4 @@
           dependency-jobs: 'verify_cord-workflow-probe_licensed'
       - 'make-unit-test':
           dependency-jobs: 'verify_cord-workflow-probe_tag-collision'
+          junit-allow-empty-results: true