AROS: 32/64-bit RTL compatibility and corresponding unit updates

These changes are (mostly) cosmetic changes that bring some parts of the RTL (as well as their corresponding unit) up to date to 32/64 bit compatibility.

The parts where the changes are not entirely cosmetic are those with the changes of signatures of the updated API calls (which are updated in their respective units as well).

These changes should not impact code with correct use of API calls.

These changes also indirectly solves crashes when making use debug/debugln functionality.