Fixed incorrect test (intrinsic for vnavg for u16 is missing, and the old pattern was wrong).
Fixed incorrect test (intrinsic for vnavg for u16 is missing, and the old pattern was wrong).

psuriana/Halide,ronen/Halide,psuriana/Halide,ronen/Halide,psuriana/Halide,kgnk/Halide,kgnk/Halide,jiawen/Halide,jiawen/Halide,psuriana/Halide,jiawen/Halide,jiawen/Halide,jiawen/Halide,kgnk/Halide,psuriana/Halide,ronen/Halide,ronen/Halide,kgnk/Halide,psuriana/Halide,ronen/Halide,psuriana/Halide,ronen/Halide,ronen/Halide,kgnk/Halide,kgnk/Halide,jiawen/Halide,kgnk/Halide,ronen/Halide,jiawen/Halide,kgnk/Halide