Please Add support for Grep option for busybox

[mrxyzl]

Current newest all winner v2 don't support grep command according to https://github.com/roleoroleo/yi-hack-Allwinner-v2/blob/master/src/busybox/.config

Which lead to this bug that I get (grep: unrecognize command - A)
denven/yihack-onedrive-uploader#12

[roleoroleo]

I will add it.

EDIT

a896c78

[github-actions]

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