disable autolock in image builder for VM images

[MerlijnWajer]

This prevents the screen from going black and only ever responding when someone pressing the power key button (which can be tricky)

[IMbackK]

we could also add a leste-config package for vm/desktop/rpi that avoids mce even turing off the display at all (unless power is pressed) leaving timeout blanking to the usual xorg method. mce now also allows the power button to be rebound to any key so we could rebind it to meta or f-something. Amoung other defaults improvements.

[parazyd]

@MerlijnWajer Is this enough? https://github.com/maemo-leste/image-builder/commit/18a6cc184c9598d9d6dd8a1d9b083d65b5e51063

[MerlijnWajer]

I would imagine so, we should probably test it before closing.

[MerlijnWajer]

Are you sure it's gconftool and not gconftool-2?

[MerlijnWajer]

I also like @IMbackK 's suggestion regarding leste-config (we could do both).