Snippets for solarus 2.1.1 from Nix x86_64-linux

Sourced from https://hydra.nixos.org/log/rm0qil6iy288bg9b6c3ifirkdsix6l8p-solarus-2.1.1.drv.

• /build/source/src/core/QuestFiles.cpp:552:39: warning: 'const char* PHYSFS_getUserDir()' is deprecated [-Wdeprecated-declarations]
    552 |   return std::string(PHYSFS_getUserDir());
        |                      ~~~~~~~~~~~~~~~~~^~