gpxsee: 7.11 -> 7.12

[sikmir]

Motivation for this change

Changelog:

• Added support for SeeYou CUP files.
• Added support for Geographic 2D projection in vector maps.
• Fixed lat/lon reference parsing in big endian EXIF entries.

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS)
• 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 nix-review --run "nix-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)
• Assured whether relevant documentation is up to date
• Fits CONTRIBUTING.md.

---

[srhb]

@GrahamcOfBorg build gpxsee