We patch gobject-introspection somewhat heavily, so add some unit tests that
will catch potential errors when we're eg. updating the patches.
There's two tests:
- Basic test for absolute nix store paths (testing absolute_shlib_path.patch)
- Test for macos `@rpath` sanitizing, including
fallback_libpath (macos-shared-library.patch)
Tor Hedin Brønner