hasl/hasl

Do some Meson cleanups done elsewhere

6 months ago, Elliott Sales de Andrade
ca6442534909
Do some Meson cleanups done elsewhere

- Remove unused variables
- Use `libraries` for `pkgconfig.generate`

Testing Done:
Compiled

Reviewed at https://reviews.imfreedom.org/r/2806/
syntax: glob
*.orig
syntax: regexp
^build.*\/
^po\/.*\.pot$
^subprojects\/.+\/