mangohud: backport gcc-13 fix

Without the change the build fails on `gcc-13` as:

    $ nix build --impure --expr 'with import ./. {}; mangohud.override { stdenv = gcc13Stdenv; }' -L

    mangohud> In file included from ../tests/../src/amdgpu.h:8,
    mangohud>                  from ../tests/test_amdgpu.cpp:9:
    mangohud> ../tests/../src/overlay_params.h:229:21: error: 'uint32_t' is not a member of 'std'; did you mean 'wint_t'?
    mangohud>   229 |    std::vector<std::uint32_t> fps_limit;
    mangohud>       |                     ^~~~~~~~
    mangohud>       |                     wint_t

0 files changed, 0 insertions, 0 deletions