Change order of operation to avoid ubsan warnings
Change order of operation to avoid ubsan warnings

This commit change an order of operation to avoid left shifts of
negative numbers.

Change-Id: I607c7eb91658c7a5ef397fc1504721d1b10e3dd6

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