binaryop implicit broadcast B with 1 dimension rank for outer axis

[nihui]

No description provided.

[codecov-commenter]

Codecov Report

Merging #4930 (26df76b) into master (0a8cf31) will increase coverage by 0.00%.
Report is 2 commits behind head on master.
The diff coverage is 100.00%.

@@           Coverage Diff            @@
##           master    #4930    +/-   ##
========================================
  Coverage   94.91%   94.91%            
========================================
  Files         776      776            
  Lines      226096   226417   +321     
========================================
+ Hits       214589   214910   +321     
  Misses      11507    11507            

Files Changed	Coverage Δ
src/layer/arm/binaryop_arm.cpp	99.66% <100.00%> (+0.04%)	⬆️
src/layer/arm/binaryop_arm_asimdhp.cpp	99.71% <100.00%> (+0.03%)	⬆️
src/layer/binaryop.cpp	99.44% <100.00%> (+0.03%)	⬆️
src/layer/loongarch/binaryop_loongarch.cpp	99.67% <100.00%> (+0.04%)	⬆️
src/layer/mips/binaryop_mips.cpp	99.67% <100.00%> (+0.04%)	⬆️
src/layer/riscv/binaryop_riscv.cpp	99.83% <100.00%> (+0.02%)	⬆️
src/layer/vulkan/binaryop_vulkan.cpp	99.64% <100.00%> (+0.01%)	⬆️
src/layer/x86/binaryop_x86.cpp	99.80% <100.00%> (+0.01%)	⬆️