[PATCH V3 2/3] base-files: sysupgrade: use tar helper to include installed_packages.txt

[Jo-Philipp Wich]

Hi,

> [...]
> Replace mount + overlay with manually built tar archive that gets
> prepended to the actual config files backup. This allows more
> flexibility with including extra backup files. They can be included at
> any paths and don't require writing to flash or mounting an overlay
> which has its own limitations (mount points).
> 
> Signed-off-by: Rafał Miłecki <rafal at milecki.pl>

Acked-by: Jo-Philipp Wich <jo at mein.io>

~ Jo