add gpio

hc

2023-12-04 f33f61bdb7ca6d5ebe7a78f9d8694b91360279ac

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# From https://www.musepack.net/index.php?pg=src
md5    e27b3b1249b7fbae92d656d9e3d26633    libreplaygain_r475.tar.gz
# Calculated based on the hash above
sha256    8258bf785547ac2cda43bb195e07522f0a3682f55abe97753c974609ec232482    libreplaygain_r475.tar.gz