Add patch from Hussam to remove serial line when vgaonly is set. Avoids a problem on machines with no serial port.
Add patch from Hussam to remove serial line when vgaonly is set.
Avoids a problem on machines with no serial port.

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