Update vendor/illumos/dist and vendor-sys/illumos/dist to illumos-gate 13939:20e4d8d8da6d
Update vendor/illumos/dist and vendor-sys/illumos/dist
to illumos-gate 13939:20e4d8d8da6d

illumos dtrace issues:
  3511 dtrace.c erroneously checks for memory alignment on amd64

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase