hostfs: Report append flag in ->show_options()

hostfs has an "append" mount option. Report it.

Signed-off-by: Richard Weinberger <richard@nod.at>
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index c60d886..06b3e3f 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -262,6 +262,9 @@
 	if (strlen(root_path) > offset)
 		seq_printf(seq, ",%s", root_path + offset);
 
+	if (append)
+		seq_puts(seq, ",append");
+
 	return 0;
 }