IMGAPI-408: also need to set owner to 'not set' value for the raw build files upload to /Joyent_Dev/stor/builds
IMGAPI-408: also need to set owner to 'not set' value for the raw build files upload to /Joyent_Dev/stor/builds

This is because usb-headnode.git builds pull from
/Joyent_Dev/stor/builds instead of from updates.joyent.com directly.
Ideally it would do the latter... but don't want to make that
change now, nor hammer updates.jo.

joyent/mountain-gorilla,joyent/mountain-gorilla,joyent/mountain-gorilla