qemu: Check SSDT when disabling S4 in qemu level

```
17:12:29 INFO | PASS qcow2.virtio_blk.smp2.virtio_net.Fedora.18.x86_64.guest_suspend.guest_s4.global_disable_s4
17:12:29 INFO | 
 PASS (29.81 s)
TOTAL TIME: 29.85 s
```