add .BoardConfig.mk package-file

hc

2023-05-31 43fd8d44e8182b691c8ee61d487cec02ca11afd2

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# locally computed
sha256  025cf91d509fa3985869d18ef9b8eaeb875ff3c9fcf6467beeed6eab3bb35c93  lua-msgpack-native-41a91b994c70389dc9daa1a15678741d8ec41749.tar.gz