/usr/lib/x86_64-linux-gnu/ is in libqt4-dev 4:4.8.7+dfsg-7ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/libQtCore.so
/usr/lib/x86_64-linux-gnu/libQtDBus.so
/usr/lib/x86_64-linux-gnu/libQtDeclarative.so
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/usr/lib/x86_64-linux-gnu/libQtDBus.prl
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/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
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/usr/lib/x86_64-linux-gnu/pkgconfig/QtScriptTools.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/QtSql.pc
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/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
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/usr/lib/x86_64-linux-gnu/libQtXml.so
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