to not leave traces on the host system

While we could install some in root.sh and some in lava.sh having
this in one place makes it easier to debug and since we're past
debootstrap it's more robust.

This adds a function which runs apt-get inside the generated image to
install task-gnome-desktop.  Apparently debootstrap can't handle
this.

GNOME is a massive addition so it's commented out for now as it's
probably overkill unless needed.

Signed-off-by: Bob Ham <bob.ham@puri.sm>

since gogs runs into a timeout otherwise.  See
https://code.puri.sm/Purism/Systems-Tasks/issues/20

This will allow us to use shallow clones

rather preprocess the boot files

so we rebuild properly on errors

to disable LVDS/LCD

so tools like curl etc have a trusted certificate store

makes using external SSDs and such simpler

Do this via separate variable so it can be disabled easily and we can
put this into an image flavour later.

so he/she can launch it from the console

Bind mount qemu-arm-static so we can run commands inside the chroot

Do this via separate variable so it can be disabled easily and we can
put this into an image flavour later.

We store the uboot update in a subdirectory

so one can see progress during the image write

Change the instructions back to using the mainline kernel

We need ti-connectivity firmware for the WiFi chipse

This gives us HDMI and it's a one line change to switch to another
kernel.

Trust in version control

This makes it simple to ship e.g. u-boot updates for the nitrogen boards

This increases readability since I don't have to wonder where it's used.
If we need it we should export it from lava.sh and not duplicate the
logic here.

This improves readability and we can override functions for different
boards.

We don't have a good default and set if for every board anyway.