/usr/include/qt5/QtPrintSupport/ is in qtbase5-dev 5.2.1+dfsg-1ubuntu14.3.
This file is owned by root:root, with mode 0o755.
..
/usr/include/qt5/QtPrintSupport/QAbstractPrintDialog
/usr/include/qt5/QtPrintSupport/QPageSetupDialog
/usr/include/qt5/QtPrintSupport/QPrintDialog
/usr/include/qt5/QtPrintSupport/QPrintEngine
/usr/include/qt5/QtPrintSupport/QPrintPreviewDialog
/usr/include/qt5/QtPrintSupport/QPrintPreviewWidget
/usr/include/qt5/QtPrintSupport/QPrinter
/usr/include/qt5/QtPrintSupport/QPrinterInfo
/usr/include/qt5/QtPrintSupport/QtPrintSupport
/usr/include/qt5/QtPrintSupport/QtPrintSupportDepends
/usr/include/qt5/QtPrintSupport/QtPrintSupportVersion
/usr/include/qt5/QtPrintSupport/qabstractprintdialog.h
/usr/include/qt5/QtPrintSupport/qpagesetupdialog.h
/usr/include/qt5/QtPrintSupport/qprintdialog.h
/usr/include/qt5/QtPrintSupport/qprintengine.h
/usr/include/qt5/QtPrintSupport/qprinter.h
/usr/include/qt5/QtPrintSupport/qprinterinfo.h
/usr/include/qt5/QtPrintSupport/qprintpreviewdialog.h
/usr/include/qt5/QtPrintSupport/qprintpreviewwidget.h
/usr/include/qt5/QtPrintSupport/qtprintsupportglobal.h
/usr/include/qt5/QtPrintSupport/qtprintsupportversion.h