[Prelu x86] Finish intrinsic with elempack merged

[LRY89757]

• Finish the merge of multi-elempack
• Add some test samples for coverage
• Please check the instancenorm:
  • #4062

[codecov-commenter]

Codecov Report

Merging #4116 (80b82c0) into master (acbaaa6) will decrease coverage by 1.43%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #4116      +/-   ##
==========================================
- Coverage   94.43%   92.99%   -1.44%     
==========================================
  Files         748      748              
  Lines      179004   178586     -418     
==========================================
- Hits       169046   166082    -2964     
- Misses       9958    12504    +2546     

Impacted Files	Coverage Δ
src/layer/x86/prelu_x86.cpp	100.00% <100.00%> (ø)
src/layer/x86/x86_activation.h	100.00% <100.00%> (ø)
src/layer/x86/convolution_2x2_pack8.h	2.75% <0.00%> (-97.25%)	:arrow_down:
src/layer/x86/deconvolution_pack8.h	10.76% <0.00%> (-89.24%)	:arrow_down:
src/layer/x86/convolution_sgemm_pack8.h	14.24% <0.00%> (-85.24%)	:arrow_down:
src/layer/x86/convolution_sgemm_pack4to8.h	29.16% <0.00%> (-70.84%)	:arrow_down:
src/layer/x86/convolution_pack8.h	34.42% <0.00%> (-65.58%)	:arrow_down:
src/layer/x86/convolution_pack4to8.h	42.85% <0.00%> (-55.11%)	:arrow_down:
...c/layer/x86/convolution_winograd_transform_pack8.h	54.90% <0.00%> (-45.10%)	:arrow_down:
src/layer/x86/convolution_3x3_pack1to8.h	39.95% <0.00%> (-40.04%)	:arrow_down:
... and 45 more

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.