10+% performance improvement of ggml_vec_dot_q4_0 on AVX2#654

sw merged 3 commits intoggml-org:masterggml-org/llama.cpp:masterfrom

SebastianApel:performance_improvement_q4_0_AVX2SebastianApel/llama.cpp:performance_improvement_q4_0_AVX2Copy head branch name to clipboard