tests: don't use "debugfs -f /dev/stdin"

Don't use "debugfs -f /dev/stdin" for portability reasons --- not all
systems have /dev/stdin.  Simply dropping "-f /dev/stdin" works just
fine.

Reported-by: Rical Jasan <ricaljasan@pacific.net>

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2 files changed