/usr/lib/ is in libdune-grid-glue-dev 2.5.0-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/dunecontrol/
/usr/lib/dunecontrol/dune-grid-glue/
/usr/lib/dunecontrol/dune-grid-glue/dune.module
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/cmake/
/usr/lib/x86_64-linux-gnu/cmake/dune-grid-glue/
/usr/lib/x86_64-linux-gnu/cmake/dune-grid-glue/dune-grid-glue-config-version.cmake
/usr/lib/x86_64-linux-gnu/cmake/dune-grid-glue/dune-grid-glue-config.cmake
/usr/lib/x86_64-linux-gnu/cmake/dune-grid-glue/dune-grid-glue-targets-none.cmake
/usr/lib/x86_64-linux-gnu/cmake/dune-grid-glue/dune-grid-glue-targets.cmake
/usr/lib/x86_64-linux-gnu/libdunegridglue.so.2.5.0
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/lib/x86_64-linux-gnu/pkgconfig/dune-grid-glue.pc
/usr/lib/x86_64-linux-gnu/libdunegridglue.so