Fix bake_flatcar_image.sh to allow adding several sysext overlays at once

[jsalatiel]

Description

According to the script help, I should be able to run:

bake_flatcar_image.sh --release beta --vendor qemu_uefi sysext1:sysext1.raw sysext2:sysext2.raw  sysext3:sysext3.raw  ...

The problem is that only the first sysext package will be added to the final image. The remaining are just ignored.

Impact

Cant add several sysext overlays at once

Environment and steps to reproduce

1. Create some sysext
2. Try to add more then one using the current syntax

Expected behavior

It should add all images

[t-lo]

Thank you for reporting this! Unfortunately I'm unable to repro... We merged a bugfix yesterday which might have improved the situation: #56

I just ran

./bake_flatcar_image.sh --release alpha --vendor qemu_uefi wasmtime:wasmtime-18.0.1-x86-64.raw kubernetes:kubernetes-v1.29.2-x86-64.raw

with wasmtime and kubernetes downloaded from the bakery and ended up with a qemu image that had both included.

If it's still broken for you, could you please run

bake_flatcar_image.sh --release beta --vendor qemu_uefi sysext1:sysext1.raw sysext2:sysext2.raw  sysext3:sysext3.raw  2>&1 | tee log

and then attach log to this issue?

[jsalatiel]

#56 fixed the problem for me.
Thanks!