/usr/lib/ is in libkf5ldap-dev 15.12.3-0ubuntu1.
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/KF5Ldap/
/usr/lib/x86_64-linux-gnu/cmake/KF5Ldap/KF5LdapTargets-debian.cmake
/usr/lib/x86_64-linux-gnu/cmake/KF5Ldap/KF5LdapTargets.cmake
/usr/lib/x86_64-linux-gnu/cmake/KF5Ldap/KF5LdapConfig.cmake
/usr/lib/x86_64-linux-gnu/cmake/KF5Ldap/FindSasl2.cmake
/usr/lib/x86_64-linux-gnu/cmake/KF5Ldap/KF5LdapConfigVersion.cmake
/usr/lib/x86_64-linux-gnu/cmake/KF5Ldap/FindLdap.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_Ldap.pri
/usr/lib/x86_64-linux-gnu/libKF5Ldap.so