add .BoardConfig.mk package-file

hc

2023-05-31 43fd8d44e8182b691c8ee61d487cec02ca11afd2

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# Locally computed
sha256  855a57d1694941ddf3c73cb79b8d0b3891e9c9e7870b4981613b734e1ad07601  gsm-1.0.17.tar.gz