[BusyBox] tar - NEW test script and patch

[Jim Gleason]

Kent (and others)

Attached are two new files for busybox tar.

tar.c.hardlink.patch.72 is a new patch to correctly handle hardlinks
within tar.c revision number 0.72 (current).
    *** I did a DUH and forgot one line.

tar_tests.bash (belongs in and runs in tests directory) is a new shell
script to test BB tar against GNU tar.
    *** I added core file checks befire and after tar file creation.

Would someone (Kent ?) test these.  This patch should fix the core dump
Kent reported earlier.

Jim Gleason

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