PC-BSD/trueos a7cdf5eJenkins Jenkinsfile-freenas-master, Jenkins/scripts snapobj.sh

Update FreeNAS PR builds, lets start using ZFS to snapshot and
rollback the /usr/obj/usr/freenas-src dataset. This will come
into play when we enable full PR builds again and avoid lots of
rebuilding of OS/Packages.
DeltaFile
+54-0Jenkins/scripts/snapobj.sh
+10-0Jenkins/Jenkinsfile-freenas-master
+64-02 files

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