Fix typo in stable-1.12 gce job, add to conformance-gce
Fix typo in stable-1.12 gce job, add to conformance-gce

GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid