overlay/036: expect EBUSY for dir inuse only when mounting with index=on

This fixes test failure with kernel v4.14-rc4 and default index=off
configuration.

Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>
1 file changed