/usr/lib/ is in libqt4-dev 4:4.8.1-0ubuntu4.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/libQt3Support.so
/usr/lib/x86_64-linux-gnu/libQtCLucene.so
/usr/lib/x86_64-linux-gnu/libQtCore.so
/usr/lib/x86_64-linux-gnu/libQtDBus.so
/usr/lib/x86_64-linux-gnu/libQtDeclarative.so
/usr/lib/x86_64-linux-gnu/libQtDesigner.so
/usr/lib/x86_64-linux-gnu/libQtUiTools.a
/usr/lib/x86_64-linux-gnu/
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/usr/lib/x86_64-linux-gnu/libQtCLucene.prl
/usr/lib/x86_64-linux-gnu/libQtCore.prl
/usr/lib/x86_64-linux-gnu/libQtDBus.prl
/usr/lib/x86_64-linux-gnu/libQtDeclarative.prl
/usr/lib/x86_64-linux-gnu/libQtDesigner.prl
/usr/lib/x86_64-linux-gnu/libQtDesignerComponents.prl
/usr/lib/x86_64-linux-gnu/libQtGui.prl
/usr/lib/x86_64-linux-gnu/libQtHelp.prl
/usr/lib/x86_64-linux-gnu/libQtNetwork.prl
/usr/lib/x86_64-linux-gnu/libQtScript.prl
/usr/lib/x86_64-linux-gnu/libQtScriptTools.prl
/usr/lib/x86_64-linux-gnu/libQtSql.prl
/usr/lib/x86_64-linux-gnu/libQtSvg.prl
/usr/lib/x86_64-linux-gnu/libQtTest.prl
/usr/lib/x86_64-linux-gnu/libQtUiTools.prl
/usr/lib/x86_64-linux-gnu/libQtXml.prl
/usr/lib/x86_64-linux-gnu/libQtXmlPatterns.prl
/usr/lib/x86_64-linux-gnu/pkgconfig/
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/usr/lib/x86_64-linux-gnu/pkgconfig/QtCLucene.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/QtCore.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/QtDBus.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/QtDeclarative.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/QtDesigner.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/QtDesignerComponents.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/QtGui.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/QtHelp.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/QtNetwork.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/QtScript.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/QtScriptTools.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/QtSql.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/QtSvg.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/QtTest.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/QtUiTools.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/QtXml.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/QtXmlPatterns.pc
/usr/lib/x86_64-linux-gnu/libQtDesignerComponents.so
/usr/lib/x86_64-linux-gnu/libQtGui.so
/usr/lib/x86_64-linux-gnu/libQtHelp.so
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/usr/lib/x86_64-linux-gnu/libQtScript.so
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/usr/lib/x86_64-linux-gnu/libQtSql.so
/usr/lib/x86_64-linux-gnu/libQtSvg.so
/usr/lib/x86_64-linux-gnu/libQtTest.so
/usr/lib/x86_64-linux-gnu/libQtXml.so
/usr/lib/x86_64-linux-gnu/libQtXmlPatterns.so