Intermittent PASS expected FAIL on /css/css-ui/text-overflow-023.html

http://build.servo.org/builders/linux-rel-css/builds/7675

```
  ▶ Unexpected subtest result in /css/css-ui/text-overflow-023.html:
  └ PASS [expected FAIL] Checks hit testing on the ellipsis
```