testing/9base: new abuild
The port for s390x is as recommended on https://plan9port-review.googlesource.com/1030
We are currently working on getting Alpine Linux 3.21 out. This means that merge requests that are not aimed to help with that (only affecting testing, new aports) have a lower priority at the moment. Please be patient, they will be eventually picked up.
The port for s390x is as recommended on https://plan9port-review.googlesource.com/1030