root.sh: Update the list of pregenerated locales

See merge request !194

ar_EG.UTF-8 is suggested by default by GNOME Initial Setup,
so use this one when pregenerating locales.

This allows all languages shown by default in GNOME Initial Setup
to work in it right away.

x86: Bump image size

See merge request !193

We need a bit more room there to unbreak the image build.

root.sh: Drop luks fixup

See merge request !192

librem5-devkit-tools dropped hardcoding the root device so no need
to fixup anymore.

See librem5-devkit-tools#32

byzantium: Switch to https

See merge request !191

There's a workaround in place on the archive server so that this
can work again.

Allow to build encrypted images via jenkins

See merge request !190

These are for testing only since they have a well known encryption
key.

Now that we cleaned up the triggers drop it here too

Drop build- and board-type

See merge request !189

 We build it via a separate repo

We're only using 'plain' in CI and this complicates the whole
stack up to the flash scripts

The corresponding kernel builds are failing since >1mo.

Byzantium: Adjust to recent osk-sdl

See merge request !179

The space is getting too tight with the additional software

This is simplistic since we e.g. don't disable compression for the
encrypted image.

Use what Debian uses which also moves the keyscript out
of the user's path.

Drop support for NXP and Emcraft EVKs and the nitrogen board

See merge request !186

Install librem5-base-defaults early

Closes #61

See merge request !185

This allows us to install e.g. apt configuration upfront.

Closes: #61

All boards use a kernel deb now (either fetched during image
build or a packaged one)

All now supported boards use flash-kernel.

We've not built those since ages, they don't use prepackaged
uboot and kernels and mainline kernel support is good enough
for the NXP EVK that a pregenerated image is easy to modify
to boot there.

We used them as reference but mainline devkit support is
good enough nowadays to server as that reference.

Bump default image-size

See merge request !184

This makes sure we don't need even more space for downloaded packages.

Only the L5 can currently cope with a smaller image since it
get not devtools. This unbreaks the devkit byzantium build.

root.sh: Perform dist-upgrade with the added apt repos

See merge request !183

root.sh: Drop "apt-get install gnupg"

See merge request !182

This ensures that we get updates from additional repos like amber-security
in the image out-of-box.

It was only needed for the CI repo support which has been dropped.