Martin Pitt
94bb5f8e4d
Use the new copy timestamp clamping mechanism from the previous commit to fix unreproducible wall-clock files in the generated images. That covers both modes: online mode writes through the kernel, and offline mode stages the tree in a temporary directory before handing it to mkfs or mcopy. `mcopy -m` then carries the clamped mtimes into the FAT. This complements commit34c3d57474(directory times) and commitf191ca982c(FAT insertion order). Cover all combinations (online/offline, with and without epoch) in the new `testcase_vfat_reproducibility()`. Update `testcase_make_symlinks()` to cover the symlink creation/re-fix their parent directory code paths. Sadly, images are still not reproducible byte for byte. Document systemd-repart's $SOURCE_DATE_EPOCH handling and remaining reproducibility issues in the manpage.
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