utility to do initial cross-compiler, and cross build of base
packages for new architectures.

- use subpackages="pkg:split:arch" for clean bootstrap
- fix split function for target libraries
- remove hash-style patch in favor of the configure option
- fix ada for arm*-*-*-musleabi* builds

https://github.com/wahern/lunix
Comprehensive Unix API Module for Lua

Also claim maintainership and cleanup a bit.

Also claim maintainership and cleanup a bit.

Also fix a compiler warning regarding implicit declarations.

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