Port build to elixir_make
Fixes build issue on OpenBSD. Previous solution hardcoded "make" which on OpenBSD doesn't support the Makefile.
Minimum Elixir version bumped to the same as elixir_make.
- Tested with:
- Elixir 1.17.2/OTP 26 - OpenBSD 7.6
- Elixir 1.14.5/OTP 23 - Arch Linux
Edited by Phantasm