add do1-do7 di1 procfs

hc

2023-10-12 3124110e504ba82e43686669ed7188bcdbe72744

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# From https://gstreamer.freedesktop.org/src/gstreamer/gstreamer-1.20.3.tar.xz.sha256sum
sha256  607daf64bbbd5fb18af9d17e21c0d22c4d702fffe83b23cb22d1b1af2ca23a2a  gstreamer-1.20.3.tar.xz
sha256  ad2eec519ebd4b5df86ea84dff24ae3bfa2edea846a703b58902dd221ae375db  COPYING