This converts all fedora links in our samples to `mirrors.kernel.org`.
This mirror works best from around the world, so lets avoid the wild
mix of local mirrors and instead use kernel.org.
This mirror is also well-managed and properly funded, so we should not
run into too many problems with it.
As long as this matches the build environment, this does not make
a differenece, but let us not depend on this.
This will be useful when automatically transforming dnf to rpm
pipelines, as the platform_module_id is needed as input to
osbuild-composer's dnf-json tool.
Performed using this script:
```
cat $1 | jq '(.stages[]? | select(.name == "org.osbuild.dnf") | .options.module_platform_id) |= . + "platform:f30"' | sponge $1
cat $1 | jq '(.build.pipeline.stages[]? | select(.name == "org.osbuild.dnf") | .options.module_platform_id) |= . + "platform:f30"' | sponge $1
```
Signed-off-by: Tom Gundersen <teg@jklm.no>
Add a example demonstrating hybrid boot. The main ingredients are:
- grub2 stage has `uefi` and `legacy` options
- GPT partition layout
- BIOS boot partition so that core image for grub2 legacy can
be stored (small, 1MB, type 21686148-6449-6E6F-744E-656564454649)
- ESP partition so UEFI can load grub*.efi (via the shim)
