Update vendor/illumos/dist and vendor-sys/illumos/dist
to illumos-gate 14120:e9e346400fef:
Illumos ZFS issues:
3949 ztest fault injection should avoid resilvering devices 3950 ztest: deadman fires when we're doing a scan 3951 ztest hang when running dedup test 3952 ztest: ztest_reguid test and ztest_fault_inject don't place nice together