/usr/lib/x86_64-linux-gnu/ is in libkf5identitymanagement-dev 15.12.3-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/qt5/
/usr/lib/x86_64-linux-gnu/cmake/
/usr/lib/x86_64-linux-gnu/cmake/KF5IdentityManagement/
/usr/lib/x86_64-linux-gnu/cmake/KF5IdentityManagement/KF5IdentityManagementConfigVersion.cmake
/usr/lib/x86_64-linux-gnu/cmake/KF5IdentityManagement/KF5IdentityManagementConfig.cmake
/usr/lib/x86_64-linux-gnu/cmake/KF5IdentityManagement/KF5IdentityManagementTargets.cmake
/usr/lib/x86_64-linux-gnu/cmake/KF5IdentityManagement/KF5IdentityManagementTargets-debian.cmake
/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_KIdentityManagement.pri
/usr/lib/x86_64-linux-gnu/libKF5IdentityManagement.so