Snippets for gamescope 3.16.25 from Nix x86_64-linux

Sourced from https://hydra.nixos.org/log/56bzfiaxv5j4a4c69wv5xzs6w569jh5q-gamescope-3.16.25.drv.

• ../layer/VkLayer_FROG_gamescope_wsi.cpp:347:10: warning: ignoring return value of 'ssize_t pread(int, void*, size_t, __off64_t)' declared with attribute 'warn_unused_result' [-Wunused-result]
    347 |     pread(fd, &overrideValue, sizeof(overrideValue), 0);
        |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~