pkg/mount: adding fields supported by freebsd

Signed-off-by: Vincent Batts <vbatts@redhat.com>

pkg/mount/mountinfo_freebsd.go

@@ -32,6 +32,8 @@ func parseMountTable() ([]*MountInfo, error) {
 	for _, entry := range entries {
 		var mountinfo MountInfo
 		mountinfo.Mountpoint = C.GoString(&entry.f_mntonname[0])
+		mountinfo.Source = C.GoString(&entry.f_mntfromname[0])
+		mountinfo.Fstype = C.GoString(&entry.f_fstypename[0])
 		out = append(out, &mountinfo)
 	}
 	return out, nil