/usr/lib/x86_64-linux-gnu/ is in qtdeclarative5-ubuntu-content1 0.1+16.04.20160309-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/qt5/
/usr/lib/x86_64-linux-gnu/qt5/qml/
/usr/lib/x86_64-linux-gnu/qt5/qml/Ubuntu/
/usr/lib/x86_64-linux-gnu/qt5/qml/Ubuntu/Content/
/usr/lib/x86_64-linux-gnu/qt5/qml/Ubuntu/Content/libubuntu-content-hub-plugin.so
/usr/lib/x86_64-linux-gnu/qt5/qml/Ubuntu/Content/ContentPeerPicker10.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/Ubuntu/Content/ContentPeerPicker13.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/Ubuntu/Content/ContentTransferHint.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/Ubuntu/Content/ResponsiveGridView.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/Ubuntu/Content/ContentPageHeader.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/Ubuntu/Content/plugins.qmltypes
/usr/lib/x86_64-linux-gnu/qt5/qml/Ubuntu/Content/ContentPeerPicker11.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/Ubuntu/Content/qmldir