iproute2: 5.10.0 -> 5.11.0

[primeos]

Motivation for this change

"Most of the changes in this release are updates
for new functionality for Data Center Bridging (dcb) utility.
Also several updates for bridge, and devlink." 0

---

TODOs:

• We likely want to enable libbpf support(?)
  • E.g. Arch and Alpine didn't enable it so I'll ignore it for now but we might want to enable it by default at some point.
• Wait for an official announcement and the Git tag
• The version string is still 5.10.0

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS linux)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Determined the impact on package closure size (by running nix path-info -S before and after)
• Ensured that relevant documentation is up to date
• Fits CONTRIBUTING.md.