system/pigz: build static version
To fix #1049 (closed) (or rather, adelie-infra/autobuilder#40 (closed)) properly, we should build a static-linked version of pigz for build / bootstrapping purposes.
To fix #1049 (closed) (or rather, adelie-infra/autobuilder#40 (closed)) properly, we should build a static-linked version of pigz for build / bootstrapping purposes.