Comment 12 for bug 1714505

Also, this upstream udev bug has caused trouble before, e.g.:
https://bugs.launchpad.net/ubuntu/+source/hw-detect/+bug/1549456

that does a udev reload too, but only when specific devices are found. Hopefully this change to update-dev will cover more cases where this upstream udev bug will cause failures, but since it's a racy 0-3 second window of stale data that udev uses, and they refuse to fix it upstream, it will be really hard to test for and/or reproduce.