pkg_tar: Fix #948: Don't add duplicate directory members to tar file when a symlink with the same path exists #949
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Fixes #948.
I've modified the deduplication logic to account for the fact that directories must not have the same path as other types of files. Previously, the paths
/liband/lib/would be treated differently.Two test cases are included: one for symlinks preceding directories, and one for directories preceding symlinks. In both cases, the first member is preserved and the second member with the same path is discarded as a duplicate.