gmsh: pull gcc-13 build fix from upstream

[trofi]

Without the change gmsh build fails in staging-next as:

/build/gmsh-4.11.1-source/src/mesh/meshGFacePack.cpp:209:7: error: 'uint32_t' was not declared in this scope
  209 |   for(uint32_t j = 0; j < 6; j++) {
      |       ^~~~~~~~
/build/gmsh-4.11.1-source/src/mesh/meshGFacePack.cpp:16:1: note: 'uint32_t' is defined in header '<cstdint>'; did you forget to '#include <cstdint>'?
   15 | #include "robustPredicates.h"
  +++ |+#include <cstdint>

Description of changes

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandboxing enabled in nix.conf? (See Nix manual)
  • sandbox = relaxed
  • sandbox = true
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 24.05 Release Notes (or backporting 23.05 and 23.11 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

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