x86: Add 8-bit w_mask_422 and w_mask_444 SSSE3 asm

w_mask_422_w4_8bpc_c:        317.2
w_mask_422_w4_8bpc_ssse3:     31.7
w_mask_422_w4_8bpc_avx2:      25.9
w_mask_422_w8_8bpc_c:        935.8
w_mask_422_w8_8bpc_ssse3:     65.6
w_mask_422_w8_8bpc_avx2:      45.2
w_mask_422_w16_8bpc_c:      3005.7
w_mask_422_w16_8bpc_ssse3:   188.2
w_mask_422_w16_8bpc_avx2:    106.8
w_mask_422_w32_8bpc_c:     11646.0
w_mask_422_w32_8bpc_ssse3:   724.6
w_mask_422_w32_8bpc_avx2:    387.8
w_mask_422_w64_8bpc_c:     27952.3
w_mask_422_w64_8bpc_ssse3:  1729.0
w_mask_422_w64_8bpc_avx2:    968.2
w_mask_422_w128_8bpc_c:    71068.1
w_mask_422_w128_8bpc_ssse3: 4315.5
w_mask_422_w128_8bpc_avx2:  2391.1

w_mask_444_w4_8bpc_c:        349.5
w_mask_444_w4_8bpc_ssse3:     29.0
w_mask_444_w4_8bpc_avx2:      22.5
w_mask_444_w8_8bpc_c:        939.1
w_mask_444_w8_8bpc_ssse3:     64.5
w_mask_444_w8_8bpc_avx2:      37.3
w_mask_444_w16_8bpc_c:       966.0
w_mask_444_w16_8bpc_ssse3:   180.7
w_mask_444_w16_8bpc_avx2:     99.7
w_mask_444_w32_8bpc_c:      2013.8
w_mask_444_w32_8bpc_ssse3:   701.9
w_mask_444_w32_8bpc_avx2:    368.9
w_mask_444_w64_8bpc_c:      4660.9
w_mask_444_w64_8bpc_ssse3:  1664.8
w_mask_444_w64_8bpc_avx2:    943.2
w_mask_444_w128_8bpc_c:    11281.7
w_mask_444_w128_8bpc_ssse3: 4122.2
w_mask_444_w128_8bpc_avx2:  2353.1