add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

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# Locally computed:
sha256  e4e38bdc7ef70645ce33740ddcca051248d56b53283c0dc6d404e17706f6fb51  libcgroup-0.41.tar.bz2