/usr/lib/ is in libkf5libkdepim-dev 4:16.04.2-3.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/cmake/
/usr/lib/x86_64-linux-gnu/cmake/KF5Libkdepim/
/usr/lib/x86_64-linux-gnu/cmake/KF5Libkdepim/KF5LibkdepimConfig.cmake
/usr/lib/x86_64-linux-gnu/cmake/KF5Libkdepim/KF5LibkdepimConfigVersion.cmake
/usr/lib/x86_64-linux-gnu/cmake/KF5Libkdepim/KF5LibkdepimTargets-debian.cmake
/usr/lib/x86_64-linux-gnu/cmake/KF5Libkdepim/KF5LibkdepimTargets.cmake
/usr/lib/x86_64-linux-gnu/cmake/MailTransportDBusService/
/usr/lib/x86_64-linux-gnu/cmake/MailTransportDBusService/MailTransportDBusServiceConfig.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_Libkdepim.pri
/usr/lib/x86_64-linux-gnu/libKF5Libkdepim.so