Fix a bug with cirrus VGA on Ubuntu 13.04.
Fix a bug with cirrus VGA on Ubuntu 13.04.

It turns out that Ubuntu 13.04 fails to initialize
cirrus VGA, so you get no output on the graphical
console.  This ends up being a kernel bug, so work
around it by disabling the graphical console
automatically at the end of installation.

Signed-off-by: Chris Lalancette <281cd07d7578d97c83271fbbf2faddb83ab3791c@gmail.com>

nullr0ute/oz,ndonegan/oz,cernops/oz,NeilBryant/oz,cernops/oz,nullr0ute/oz,clalancette/oz,moofrank/oz,NeilBryant/oz,mgagne/oz,mgagne/oz,moofrank/oz,ndonegan/oz,imcleod/oz,imcleod/oz,clalancette/oz