Ensure that hw.disknames gets updated whenever a disklabel is set, since the disklabel UID may have changed.
Ensure that hw.disknames gets updated whenever a disklabel is set, since
the disklabel UID may have changed.

ok krw@ deraadt@

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars