vp9-svc: Fix to update layer counters when layer is skipped.
vp9-svc: Fix to update layer counters when layer is skipped.

Update layer counters when layer is skipped,
for any spatial layer.

Change-Id: Ie37c4a16ccafdef3390b651dec473beb5d926896

ShiftMediaProject/libvpx,webmproject/libvpx,ShiftMediaProject/libvpx,webmproject/libvpx,webmproject/libvpx,ShiftMediaProject/libvpx,ShiftMediaProject/libvpx,webmproject/libvpx,ShiftMediaProject/libvpx,webmproject/libvpx,webmproject/libvpx