add benchmark of yolo series

[mpj1234]

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[tencent-adm]

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[github-actions]

The binary size change of libncnn.so (bytes)

architecture	base size	pr size	difference
x86_64	15159560	15159560	0 😘
armhf	6186432	6186432	0 😘
aarch64	9521008	9521008	0 😘