Bug: webm:1833
Change-Id: I8133f678cf4231f2d048c61e42622b883897712a
Fix mask in vp9_quantize_avx2,highbd_get_max_lane_eob.
Fix to int overflow in vp9_calc_pframe_target_size_one_pass_cbr.
Fix to integer overflow in vp8,ratectrl.c.
- Fix to interger overflow in vp9 svc.
+ Fix to integer overflow in vp9 svc.
Fix to avg_frame_bandwidth overflow.
Fix to per frame qp for temporal layers.
Fix to unsigned integer overflow in sse computation.