lpf_8_test: add missing vpx_lpf_vertical_4 tests
lpf_8_test: add missing vpx_lpf_vertical_4 tests

mmx, msa

Change-Id: I113ce0ec144ee673d5dcde4c03fe7670f9f4c369

mwgoldsmith/vpx,smarter/aom,webmproject/libvpx,GrokImageCompression/aom,smarter/aom,mbebenita/aom,ittiamvpx/libvpx-1,luctrudeau/aom,ShiftMediaProject/libvpx,ittiamvpx/libvpx-1,GrokImageCompression/aom,GrokImageCompression/aom,mbebenita/aom,mwgoldsmith/vpx,mwgoldsmith/libvpx,luctrudeau/aom,smarter/aom,mbebenita/aom,GrokImageCompression/aom,webmproject/libvpx,ShiftMediaProject/libvpx,ittiamvpx/libvpx-1,mwgoldsmith/libvpx,webmproject/libvpx,smarter/aom,Topopiccione/libvpx,mwgoldsmith/vpx,ShiftMediaProject/libvpx,Topopiccione/libvpx,luctrudeau/aom,luctrudeau/aom,mbebenita/aom,ShiftMediaProject/libvpx,webmproject/libvpx,mwgoldsmith/vpx,mwgoldsmith/libvpx,webmproject/libvpx,mwgoldsmith/libvpx,webmproject/libvpx,smarter/aom,GrokImageCompression/aom,luctrudeau/aom,Topopiccione/libvpx,Topopiccione/libvpx,smarter/aom,luctrudeau/aom,ittiamvpx/libvpx-1,mbebenita/aom,mwgoldsmith/libvpx,mwgoldsmith/vpx,ShiftMediaProject/libvpx,ittiamvpx/libvpx-1,mwgoldsmith/libvpx,Topopiccione/libvpx,mbebenita/aom,mbebenita/aom,Topopiccione/libvpx,ittiamvpx/libvpx-1,mbebenita/aom,mwgoldsmith/vpx,mbebenita/aom,GrokImageCompression/aom