fix(dracut.sh): Handle ImageBase for uefi

[keentux]

• UEFI creation didn't handle the ImageBase data for the PE file generation.
  Create an UKI thanks a stub file with a non zero ImageBase logs some warning and
  generate a bad file offset management:

objcopy: /var/tmp/dracut.lwbXWb/uefi/linux.efi:.osrel: section below image base
objcopy: /var/tmp/dracut.lwbXWb/uefi/linux.efi:.cmdline: section below image base
objcopy: /var/tmp/dracut.lwbXWb/uefi/linux.efi:.linux: section below image base
objcopy: /var/tmp/dracut.lwbXWb/uefi/linux.efi:.initrd: section below image base

• This Patch parse the PE file header, get the data and apply the ImageBase on
  the objcopy command. To test, A kind of stub file can be created directly with
  the build on systemd project. See description of Malformed section header when creating UKI with dracut and upstream systemd-stub #2284.

Checklist

• I have tested it locally
• I have reviewed and updated any documentation if relevant
• I am providing new code and test(s) for it

Fixes #2284

[aafeijoo-suse]

Thanks! It looks good, only minor comments.

[stale]

This issue is being marked as stale because it has not had any recent activity. It will be closed if no further activity occurs. If this is still an issue in the latest release of Dracut and you would like to keep it open please comment on this issue within the next 7 days. Thank you for your contributions.

[LaszloGombos]

LGTM

[medhefgo]

I fail to see what this one is supposed to achieve. As mentioned in #2284 it's already fixed with #2277. And passing --image-base will only change the PE header field, which - if not identical to the previous value - will most likely break things in nasty ways.

So, as this is just a no-op it should really be reverted.

[LaszloGombos]

@keentux do you agree with @medhefgo 's position above ?

[LaszloGombos]

@medhefgo The best way to move this forward would be if you could upload a PR for the revert, so that we have an open PR for this discussion. Also PR's from non-maintainers would actually land faster than from maintainers. Thanks