There's a closed pull request on the void-packages repository

dash: add libedit option
https://github.com/void-linux/void-packages/pull/47408

Description:
#### Testing the changes
- I tested the changes in this PR: **YES**

#### Local build testing
- I built this PR locally for my native architecture, x86_64-musl

This change allows dash to be compiled with libedit support, which gives it vi-like and emacs-like line editing.
This change DOES NOT set it to compile with that automatically, it only adds the xbps-src build option.