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/).
# physfs-rs [](https://travis-ci.org/PistonDevelopers/physfs-rs)
## Rust bindings for PhysFS
This project is built against the Rust nightly and PhysFS 2.0.3
[How to contribute](https://github.com/PistonDevelopers/piston/blob/master/CONTRIBUTING.md)