Add support for runnin a secondary instance of steam

This requires that you still have setup a primary container instance of this image.
We can then run a secondary instance of steam that will use the existing X server.

We are still limited to running one of these steam instances at a time.

overlay/etc/cont-init.d/80-configure_gpu_driver.sh

@@ -13,7 +13,7 @@ fi
 
 # NVIDIA Params
 export nvidia_pci_address="$(nvidia-smi --format=csv --query-gpu=pci.bus_id --id="${gpu_select}" 2> /dev/null | sed -n 2p | cut -d ':' -f2,3)"
-export nvidia_gpu_name=$(nvidia-smi --format=csv --query-gpu=name --id="${gpu_select}" | sed -n 2p 2> /dev/null)
+export nvidia_gpu_name=$(nvidia-smi --format=csv --query-gpu=name --id="${gpu_select}" 2> /dev/null | sed -n 2p)
 export nvidia_host_driver_version="$(nvidia-smi 2> /dev/null | grep NVIDIA-SMI | cut -d ' ' -f3)"
 
 # Intel params