Update vendor/illumos/dist and vendor-sys/illumos/dist
to illumos-gate 13967:92bec6d87f59
Illumos ZFS issues:
3557 dumpvp_size is not updated correctly when a dump zvol's size is
changed
3558 setting the volsize on a dump device does not return back ENOSPC
3559 setting a volsize larger than the space available sometimes succeeds