read from the init process error

try run:

```sh
/usr/bin/crun --cgroup-manager=cgroupfs --root=/vm/root run --pid-file=/vm/run/test.pid --preserve-fds=3 test
```

work for 1.7.2, after 1.8.0, there is a error https://github.com/containers/crun/pull/1201 just fixed few day ago.

with 1.8.4, and patch 1201, I get this new error: "read from the init process error". downgrade to 1.7.2 work fine.

more details check https://github.com/containers/crun/issues/1198