Merge "Rename highbitdepth functions to use highbd prefix"

test/convolve_test.cc

test/dct16x16_test.cc

test/dct32x32_test.cc

test/fdct4x4_test.cc

test/fdct8x8_test.cc

test/vp9_intrapred_test.cc

vp9/common/vp9_convolve.c

vp9/common/vp9_convolve.h

vp9/common/vp9_idct.c

vp9/common/vp9_idct.h

vp9/common/vp9_loopfilter.c

vp9/common/vp9_loopfilter_filters.c

vp9/common/vp9_reconinter.c

vp9/common/vp9_reconinter.h

vp9/common/vp9_reconintra.c

vp9/common/vp9_rtcd_defs.pl

vp9/common/vp9_scale.c

vp9/common/vp9_scale.h

vp9/common/x86/vp9_asm_stubs.c

vp9/common/x86/vp9_high_intrapred_sse2.asm