vp9-svc: Fix some stats in vp9_spatial_svc_encoder.
vp9-svc: Fix some stats in vp9_spatial_svc_encoder.

Correction to rate control stats output under -rcstat.

Change-Id: I46fa5d2a66ed657121ee3d685608a148bb9a7bb3

Topopiccione/libvpx,ShiftMediaProject/libvpx,mwgoldsmith/libvpx,webmproject/libvpx,mwgoldsmith/vpx,ShiftMediaProject/libvpx,webmproject/libvpx,webmproject/libvpx,Topopiccione/libvpx,mwgoldsmith/vpx,webmproject/libvpx,mwgoldsmith/libvpx,mwgoldsmith/libvpx,Topopiccione/libvpx,Topopiccione/libvpx,ShiftMediaProject/libvpx,ShiftMediaProject/libvpx,mwgoldsmith/libvpx,mwgoldsmith/vpx,Topopiccione/libvpx,webmproject/libvpx,mwgoldsmith/vpx,ShiftMediaProject/libvpx,mwgoldsmith/libvpx,Topopiccione/libvpx,mwgoldsmith/vpx,webmproject/libvpx,mwgoldsmith/libvpx,mwgoldsmith/vpx