Fix android builds: use std::ffi::c_char in cstr_to_string#872

MarcusDunn merged 1 commit intoutilityai:mainutilityai/llama-cpp-rs:mainfrom

nobodywho-ooo:android-fix-cstr-to-stringnobodywho-ooo/llama-cpp-rs:android-fix-cstr-to-stringCopy head branch name to clipboard