Thread affinitization: pinning Julia threads to cores

[tisztamo]

@carstenbauer

it seems that there is only a single Julia package in the ecosystem which uses it: Circo/circonode.sh at v0.1.1 · Circo-dev/Circo · GitHub.

And that one only uses it currently to avoid a Julia crash in (I guess) error logging when a stacktrace is attached, which I was not yet able to localize down to a reportable mwe…