Use high precedence when manually submitting jobs

Change-Id: Ida30e4e2cfad78c38681631bde46a907f8d25bbe
diff --git a/tools/trigger-job.py b/tools/trigger-job.py
index dff4e3f..7123afc 100755
--- a/tools/trigger-job.py
+++ b/tools/trigger-job.py
@@ -68,7 +68,7 @@
     job = gear.Job("build:%s" % args.job,
                    json.dumps(data),
                    unique=data['ZUUL_UUID'])
-    c.submitJob(job)
+    c.submitJob(job, precedence=gear.PRECEDENCE_HIGH)
 
     while not job.complete:
         time.sleep(1)