Building only cross-compiler with aports/scripts/bootstrap.sh
This is a suggestion to add a flag to bootstrap.sh that allows for building only the cross-compiler packages that are required when cross-compiling with abuild.
./bootstrap.sh arm will build the correct cross-compiler
packages, but also the entire Alpine base system for arm, which is
unnecessary for just building a custom kernel or package for e.g a
(from redmine: issue id 10038, created on 2019-02-28)