[BusyBox] Tar in unstable

[Richard Doyle]

Just a status report:  the version of tar in the today's unstable branch
still fails several tests in the testsuite: 

FAIL: tar-archives-multiple-files
XPASS: tar-complains-about-missing-file
PASS: tar-demands-at-least-one-ctx
PASS: tar-demands-at-most-one-ctx
FAIL: tar-extracts-file
FAIL: tar-extracts-from-standard-input
FAIL: tar-extracts-multiple-files
XFAIL: tar-handles-cz-options
FAIL: tar-handles-empty-include-and-non-empty-exclude-list
FAIL: tar-handles-exclude-and-extract-lists
PASS: tar-handles-multiple-X-options
FAIL: tar-handles-nested-exclude