The paths are not adapted to the TEST_TOP added long time ago in
e44f595dd7 ("btrfs-progs: tests: unify test drivers, make ready for
extenral testsuite").
Signed-off-by: David Sterba <dsterba@suse.com>
Add a wrapper that sets up environment the same way a test would use it.
Use it for quick prototyping or testing, the commands and output is
logged.
Signed-off-by: David Sterba <dsterba@suse.com>