Revive qemu machine demo

[fboudra]

Hi,

Uptane org maintains the meta-updater layer but lacks the target devices to demo the technology. These bsp layers still lies under the advancedtelematic github repo but are outdated.
For testing purpose I revived the updater-repo repository (manifests) and the meta-updater-qemux86-64 layer repository to latest poky/oe-core.
Will you be interested to host the 2 repositories in order to have a test bed for PR and reduce the barrier to entry?

Eventually, I'm also interested to contribute a qemuarm64 machine (not done yet).

[pattivacek]

I think it would not at all be a bad idea to host those repos (and meta-updater-raspberrypi) in the Uptane namespace.

@tkfu @JustinCappos what do you think? Who else might we need to consider?

Honestly at this point I wonder if we couldn't ask Here to move some of the repos directly here, instead of having them forked or copied. It's not a big deal, but if they're not really supporting those repos anymore, it doesn't make sense to keep the "originals" there.

[ricardosalveti]

Wonder if it would be better to just merge qemu (x86 and arm) support as part of meta-updater itself? Qemu bsp is kind of special and it is quite useful for testing purposes, and it is also the standard bsp supported by oe-core.