Bug 1228079 - Use 3 retries when running Gij on platform builds. r=garndt

testing/taskcluster/tasks/tests/mulet_gaia_js_integration_tests.yml

@@ -1,6 +1,7 @@
 ---
 $inherits:
   from: 'tasks/tests/b2g_unittest_base.yml'
+reruns: 3
 task:
   metadata:
     name: '[TC] Mulet Gaia JS Integration Test'