Change target bitrate in vp9 datarate test.
Change target bitrate in vp9 datarate test.

Due to the change of clip.

Change-Id: Ibbe1a865df0837c349770287d148081230d10aaa

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