Update CirrOS 0.5.2 kernel image to a supported version (kernel-5.4; from Focal)

[kashyapc]

The current CirrOS 0.5.2 image is running the kernel 5.3.0-26-generic . Two problems with it: (a) it is causing a guest kernel crash in OpenStack CI[1]; and more importantly, (b) it is based on an now-unsupported Ubuntu kernel.

One of the Ubuntu kernel maintainers gave this diagnosis in this bug[1]:

"So this is a crash of the guest kernel from a CirrOS 0.5.2 image. 
That image contains a 5.3 kernel which is no longer supported. The
0.5.2 image is a minor update of the original 0.5.1 image which was
built before the release of Focal. It was pulling in the HWE kernel 
which at that time was a 5.3 kernel. The updated 0.5.2 CirrOS image
apparently didn't upgrade the kernel hence it's also on an
unsupported 5.3 kernel.

"The current (supported) Bionic HWE kernel is 5.4 (same version as
the Focal release kernel)."

[1] " Guest kernel crashes with GPF on volume attach" — https://bugs.launchpad.net/nova/+bug/2018612

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Please refresh the CirrOS 0.5.2 image with the kernel 5.4.0-148.165 (or higher) from "Focal" release. This (kernel-5.4) is LTS (long term support) kernel now.

[smoser]

It'd be nice to have you test output of the build for #103
See https://github.com/cirros-dev/cirros/actions/runs/4917496313?pr=103

you can download one of the per-arch zip files and use those to test.

[smoser]

fixed. please open if you think not.

[osfrickler]

Did you re-publish the 0.5.2 release from this build? I not, we would likely want to do a 0.5.3?

[smoser]

yes, we want to do a 0.5.3.