add ch343 driver

hc

2023-07-06 0d92c6001e626cf3cfa86b826ccc10a16115901e

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#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
n=`./default_file_splice_read </dev/null | wc -c`
 
test "$n" = 0 && exit 0
 
echo "default_file_splice_read broken: leaked $n"
exit 1