zjit_bisect.rb: Fix pipe deadlock; log when timed out [ci skip]

I spent a long time bisecting some largish program before realizing
that failure was in fact coming from the child timing out due to
zjit_bisect.rb not clearing the stdout and stderr pipe.

Fix the pipe deadlock by redirecting to /dev/null. This sacrifices
the debug output during boot, but for that we also get to remove
a lot of code and the dependency on Open3.

0 files changed, 0 insertions, 0 deletions