oeqa/selftest/archiver: Allow tests to ignore empty directories
If we tweak sstate to not remove empty directories under conditions
where a race could occur, we see failures from:
"oe-selftest -r archiver.Archiver.test_archiver_filters_by_type archiver.Archiver.test_archiver_filters_by_type_and_name"
since an empty directory is left behind. Update the tests to ignore
empty directories.
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit
10cda713faea9a348fd278137ac75e4a6d76a71c)
Signed-off-by: Steve Sakoman <steve@sakoman.com>
