Update qd8 gemm config to enable 4x16c2s2 microkernels for wasm simd

[yolanda15]

Update the qd8 gemm config to enable 4x16c2s2 microkernels for wasm simd. It also fixes a file name typo in previous PR.
Performance on Coffee Lake shows good boost for both baseline and revectorization.

Tested with d8:

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Benchmark                                                                          Time             CPU   Iterations
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Default, SIMD build:
D8TransformerBlock/T:128/D:1536/N:6/H:256/F:12288/process_time/real_time     175030 us       175035 us           24
QD8TransformerBlock/T:128/D:2048/N:8/H:256/F:16384/process_time/real_time     323143 us       323148 us           13
QD8TransformerBlock/T:128/D:2304/N:8/H:256/F:9216/process_time/real_time      219425 us       219430 us           19
QD8TransformerBlock/T:128/D:1152/N:4/H:256/F:6912/process_time/real_time       75549 us        75554 us           56

Default, Relaxed SIMD build:
QD8TransformerBlock/T:128/D:1536/N:6/H:256/F:12288/process_time/real_time     173748 us       173754 us           40
QD8TransformerBlock/T:128/D:2048/N:8/H:256/F:16384/process_time/real_time     324491 us       324496 us           22
QD8TransformerBlock/T:128/D:2304/N:8/H:256/F:9216/process_time/real_time      218274 us       218280 us           32
QD8TransformerBlock/T:128/D:1152/N:4/H:256/F:6912/process_time/real_time       74628 us        74633 us           93

4x16c2s2, SIMD build:
QD8TransformerBlock/T:128/D:1536/N:6/H:256/F:12288/process_time/real_time     157664 us       157670 us           27
QD8TransformerBlock/T:128/D:2048/N:8/H:256/F:16384/process_time/real_time     288836 us       288841 us           14
QD8TransformerBlock/T:128/D:2304/N:8/H:256/F:9216/process_time/real_time      196272 us       196277 us           21
QD8TransformerBlock/T:128/D:1152/N:4/H:256/F:6912/process_time/real_time       68001 us        68005 us           62

4x16c2s2, Relaxed SIMD build:
QD8TransformerBlock/T:128/D:1536/N:6/H:256/F:12288/process_time/real_time     155883 us       155889 us           45
QD8TransformerBlock/T:128/D:2048/N:8/H:256/F:16384/process_time/real_time     287300 us       287305 us           24
QD8TransformerBlock/T:128/D:2304/N:8/H:256/F:9216/process_time/real_time      195124 us       195128 us           36
QD8TransformerBlock/T:128/D:1152/N:4/H:256/F:6912/process_time/real_time       67092 us        67096 us          104

Tested with revectorization (d8 --experimental-wasm-revectorize):

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Benchmark                                                                          Time             CPU   Iterations
--------------------------------------------------------------------------------------------------------------------
Default, SIMD build:
QD8TransformerBlock/T:128/D:1536/N:6/H:256/F:12288/process_time/real_time     173545 us       173549 us           24
QD8TransformerBlock/T:128/D:2048/N:8/H:256/F:16384/process_time/real_time     319792 us       319797 us           13
QD8TransformerBlock/T:128/D:2304/N:8/H:256/F:9216/process_time/real_time      216803 us       216807 us           19
QD8TransformerBlock/T:128/D:1152/N:4/H:256/F:6912/process_time/real_time       74495 us        74499 us           56

Default, Relaxed SIMD build:
QD8TransformerBlock/T:128/D:1536/N:6/H:256/F:12288/process_time/real_time     173748 us       173754 us           40
QD8TransformerBlock/T:128/D:2048/N:8/H:256/F:16384/process_time/real_time     324491 us       324496 us           22
QD8TransformerBlock/T:128/D:2304/N:8/H:256/F:9216/process_time/real_time      218274 us       218280 us           32
QD8TransformerBlock/T:128/D:1152/N:4/H:256/F:6912/process_time/real_time       74628 us        74633 us           93

4x16c2s2, SIMD build:
QD8TransformerBlock/T:128/D:1536/N:6/H:256/F:12288/process_time/real_time      90432 us        90437 us           46
QD8TransformerBlock/T:128/D:2048/N:8/H:256/F:16384/process_time/real_time     176882 us       176887 us           24
QD8TransformerBlock/T:128/D:2304/N:8/H:256/F:9216/process_time/real_time      113019 us       113024 us           37
QD8TransformerBlock/T:128/D:1152/N:4/H:256/F:6912/process_time/real_time       37925 us        37928 us          110

4x16c2s2, Relaxed SIMD build:
QD8TransformerBlock/T:128/D:1536/N:6/H:256/F:12288/process_time/real_time      90973 us        90978 us           76
QD8TransformerBlock/T:128/D:2048/N:8/H:256/F:16384/process_time/real_time     177860 us       177865 us           39
QD8TransformerBlock/T:128/D:2304/N:8/H:256/F:9216/process_time/real_time      114225 us       114230 us           61
QD8TransformerBlock/T:128/D:1152/N:4/H:256/F:6912/process_time/real_time       38300 us        38305 us          183