Sweep: Replace 'x-hack' conditionals in artifact-rootfs.sh and artifact-kernel.sh

[sweep-ai[bot]]

• In lib/functions/artifacts/artifact-rootfs.sh, replace all 'x-hack' conditionals with modern conditionals.
• In lib/functions/artifacts/artifact-kernel.sh, replace all 'x-hack' conditionals with modern conditionals.

Parent issue: #2

Checklist

- [X] `lib/functions/artifacts/artifact-rootfs.sh` ❌ Failed - [X] `lib/functions/artifacts/artifact-kernel.sh` ❌ Failed

[sweep-ai[bot]]

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File Path	Proposed Changes
lib/functions/artifacts/artifact-rootfs.sh	Modify lib/functions/artifacts/artifact-rootfs.sh with contents: • Identify all 'x-hack' conditionals in the artifact-rootfs.sh file. • Replace each 'x-hack' conditional with a modern conditional. • Ensure that the logic of the code remains the same after the replacement.
lib/functions/artifacts/artifact-kernel.sh	Modify lib/functions/artifacts/artifact-kernel.sh with contents: • Identify all 'x-hack' conditionals in the artifact-kernel.sh file. • Replace each 'x-hack' conditional with a modern conditional. • Ensure that the logic of the code remains the same after the replacement.

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