Groupnorm_arm

[mmyyy22]

• add groupnorm_arm optimize

[codecov-commenter]

Codecov Report

Merging #4080 (80a7b79) into master (00c08d7) will decrease coverage by 0.59%. The diff coverage is 51.45%.

@@            Coverage Diff             @@
##           master    #4080      +/-   ##
==========================================
- Coverage   94.43%   93.84%   -0.60%     
==========================================
  Files         748      750       +2     
  Lines      179005   178317     -688     
==========================================
- Hits       169047   167340    -1707     
- Misses       9958    10977    +1019     

Impacted Files	Coverage Δ
src/layer/arm/groupnorm_arm_asimdhp.cpp	36.02% <36.02%> (ø)
src/layer/arm/groupnorm_arm.cpp	62.96% <62.96%> (ø)
src/layer/x86/convolution_3x3_pack1to4.h	49.33% <0.00%> (-50.67%)	:arrow_down:
src/layer/x86/quantize_x86.cpp	69.50% <0.00%> (-27.43%)	:arrow_down:
src/layer/x86/x86_usability.h	89.12% <0.00%> (-10.88%)	:arrow_down:
src/layer/x86/requantize_x86.cpp	90.21% <0.00%> (-8.59%)	:arrow_down:
src/layer/x86/concat_x86.cpp	92.47% <0.00%> (-5.82%)	:arrow_down:
src/layer/x86/slice_x86.cpp	92.94% <0.00%> (-5.78%)	:arrow_down:
src/layer/x86/crop_x86.cpp	82.82% <0.00%> (-3.48%)	:arrow_down:
src/layer/x86/yolov3detectionoutput_x86.cpp	94.28% <0.00%> (-2.86%)	:arrow_down:
... and 31 more

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[nihui]

hi, the test failure indicates that your code produces wrong result in some condition. please investigate it.