Anonymous dtrace fixes and updated access.log

My PR per the omnios-discuss kayak thread. gmake DEBUG=1 will now build bigroot instead of miniroot and include debugging packages. In addition PASSREQ is disabled for the miniroot so NO_REBOOT is actually useful (rootpw is empty, not hash of the empty string, in the miniroot). The anonymous dtrace script has been updated to match the output format that build_image.sh expects. Updated access.log for r151006_36 and it seems to install fine now.

In addition it looks like this github repo is out of sync with the anonymous access git repo from which I synced changes; esproul's commit in this PR should already be applied to your master branch.