Port: don't quote wc output in test scripts

The 'wc' command on macOS prefixes the count it returns with spaces, if
we quote the output it won't be properly converted to integer for the
comparison.

Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>