add gpio

hc

2023-12-04 f33f61bdb7ca6d5ebe7a78f9d8694b91360279ac

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# From https://sourceware.org/elfutils/ftp/0.169/sha512.sum
sha512 0a81a20bb2aff533d035d6b76f1403437b2e11bce390db57e34b8c26e4b9b3150346d83dddcbfbbdc58063f046ca3223508dba35c6ce88e375d201e7a777a8b9  elfutils-0.169.tar.bz2