add .BoardConfig.mk package-file

hc

2023-05-31 43fd8d44e8182b691c8ee61d487cec02ca11afd2

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# Locally calculated
sha256    453fc1d0e9b6a44bbada4290d565f840a5e96ba2d1b47562ba38bd9c7e82195a  luasocket-3.0rc1-1.src.rock