hostfs: dumb (and usually harmless) tpyo - strncpy instead of strlcpy

... not harmless in this case - we have a string in the end of buffer
already.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/hostfs/hostfs_kern.c

@@ -104,7 +104,7 @@ static char *__dentry_name(struct dentry *dentry, char *name)
 		__putname(name);
 		return NULL;
 	}
-	strncpy(name, root, PATH_MAX);
+	strlcpy(name, root, PATH_MAX);
 	if (len > p - name) {
 		__putname(name);
 		return NULL;