timeloop: fix `gcc-13` build failure

Without the change build fails on `master` as
https://hydra.nixos.org/build/248973743:

include/compound-config/compound-config.hpp:149:8: error: ‘uint64_t’ in namespace ‘std’ does not name a type; did you mean ‘wint_t’?
149 | std::uint64_t parseElementSize(std::string name);
| ^~~~~~~~
| wint_t

+4
+4
pkgs/applications/science/computer-architecture/timeloop/default.nix
··· 46 46 env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-fno-lto"; 47 47 48 48 postPatch = '' 49 + # Fix gcc-13 build failure due to missing includes: 50 + sed -e '1i #include <cstdint>' -i \ 51 + include/compound-config/compound-config.hpp 52 + 49 53 # use nix ar/ranlib 50 54 substituteInPlace ./SConstruct \ 51 55 --replace "env.Replace(AR = \"gcc-ar\")" "" \