
Change the mode used to create log files to allow world read access.
We have determined that there really isn't any risk in doing so.  This will
stop rsync/loghole from complaining when transfering data from plab nodes.
It was failing to transfer some log files created as root.

nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome