/usr/lib/x86_64-linux-gnu/ is in libkf5gpgmepp-dev 15.12.3-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/cmake/
/usr/lib/x86_64-linux-gnu/cmake/KF5Gpgmepp/
/usr/lib/x86_64-linux-gnu/cmake/KF5Gpgmepp/KF5GpgmeppTargets.cmake
/usr/lib/x86_64-linux-gnu/cmake/KF5Gpgmepp/KF5GpgmeppTargets-debian.cmake
/usr/lib/x86_64-linux-gnu/cmake/KF5Gpgmepp/KF5GpgmeppConfig.cmake
/usr/lib/x86_64-linux-gnu/cmake/KF5Gpgmepp/KF5GpgmeppConfigVersion.cmake
/usr/lib/x86_64-linux-gnu/qt5/
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/modules/
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/modules/qt_QGpgme.pri
/usr/lib/x86_64-linux-gnu/libKF5Gpgmepp-pthread.so
/usr/lib/x86_64-linux-gnu/libKF5Gpgmepp.so
/usr/lib/x86_64-linux-gnu/libKF5QGpgme.so