Added additional sanity check in symbolic link removal test
Added additional sanity check in symbolic link removal test

This commit adds an additional sanity check for our directory symbolic
link removal test that ensures the target directory's contents are
unaffected.

Signed-off-by: Jacob Howard <f862f167b85d41b225785c70d70808bc7337c1fe@havoc.io>

havoc-io/mutagen,havoc-io/mutagen