Update vendor-sys/illumos/dist to illumos-gate 13970:c9a5683da38e
Update vendor-sys/illumos/dist to illumos-gate 13970:c9a5683da38e

Illumos ZFS issues:
  3543 Feature flags causes assertion in spa.c to miss certain cases

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