Function safe_app::ffi::app_set_additional_search_path

#[no_mangle]
pub unsafe extern "C" fn app_set_additional_search_path(
    new_path: *const c_char, 
    user_data: *mut c_void, 
    o_cb: extern "C" fn(_: *mut c_void, _: FfiResult)
)

Sets the additional path in config_file_handler to to search for files