/usr/lib/ is in qtconnectivity5-dev 5.5.1-2build1.
This file is owned by root:root, with mode 0o755.
..
/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/
/usr/lib/x86_64-linux-gnu/libQt5Bluetooth.prl
/usr/lib/x86_64-linux-gnu/cmake/
/usr/lib/x86_64-linux-gnu/cmake/Qt5Nfc/
/usr/lib/x86_64-linux-gnu/cmake/Qt5Nfc/Qt5NfcConfig.cmake
/usr/lib/x86_64-linux-gnu/cmake/Qt5Nfc/Qt5NfcConfigVersion.cmake
/usr/lib/x86_64-linux-gnu/cmake/Qt5Bluetooth/
/usr/lib/x86_64-linux-gnu/cmake/Qt5Bluetooth/Qt5BluetoothConfigVersion.cmake
/usr/lib/x86_64-linux-gnu/cmake/Qt5Bluetooth/Qt5BluetoothConfig.cmake
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/lib/x86_64-linux-gnu/pkgconfig/Qt5Nfc.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/Qt5Bluetooth.pc
/usr/lib/x86_64-linux-gnu/libQt5Nfc.prl
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/modules/qt_lib_bluetooth.pri
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/modules/qt_lib_nfc.pri
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/modules/qt_lib_bluetooth_private.pri
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/modules/qt_lib_nfc_private.pri
/usr/lib/x86_64-linux-gnu/libQt5Nfc.so
/usr/lib/x86_64-linux-gnu/libQt5Bluetooth.so