New comment by ailiop-git on void-packages repository

https://github.com/void-linux/void-packages/pull/24385#issuecomment-678399064

Comment:
> The `vsed` in line 26 [does not modify](https://travis-ci.org/github/void-linux/void-packages/jobs/719655187#L560) `Make.rules`. It should either be dropped or updated.

thanks for catching it, indeed this was addressed in upstream commit 22f2e20 ("build-system: fixes for cross-compilation"), so i've removed the entire pre_build phase since it is now redundant (tests now also work in cross-compilation). Pushed.