Fix the sound issues and crashes on some platforms
This commit updates misc/libphyslayer/physfsrwops.* files to the latest versions
provided by PhysFS project (https://github.com/icculus/physfs/tree/main/extras/).
This is version 3.1 of the iniparser library developed by N. Devillard.
See http://ndevilla.free.fr/iniparser/ for details and new versions.