add gpio

hc

2023-12-04 f33f61bdb7ca6d5ebe7a78f9d8694b91360279ac

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# From http://lists.freedesktop.org/archives/mesa-announce/2015-December/000191.html
sha256    c173154bbd0d5fb53d732471984def42fb1b14ac85fcb834138fb9518b3e0bef    mesa-demos-8.3.0.tar.bz2