Buildkit progress

I hate the colorized, scrolling, 'smart' output of buildkit. I've just
learned there's a way to force a 'dumb' output mode. I am putting this
*everywhere*.

APK builder

Dropping plans to support multiple versions, not worthwhile.

Updating to 3.20.

Update apkbuilder

Update version to 3.19.

Laying groundwork for multiple supported versions of Alpine in
apkbuilder.

Added apkbuilder