/usr/lib/ is in libcegui-mk2-dev 0.7.6-3.3.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/libCEGUISILLYImageCodec.so
/usr/lib/libCEGUIXercesParser.so
/usr/lib/libCEGUITGAImageCodec.so
/usr/lib/libCEGUISampleHelper.so
/usr/lib/libCEGUIDevILImageCodec.so
/usr/lib/libCEGUIFalagardWRBase.so
/usr/lib/libCEGUISTBImageCodec.la
/usr/lib/libCEGUIOpenGLRenderer.la
/usr/lib/libCEGUIXercesParser.la
/usr/lib/libCEGUIFalagardWRBase.la
/usr/lib/libCEGUISampleHelper.la
/usr/lib/libCEGUIOgreRenderer.la
/usr/lib/libCEGUINullRenderer.la
/usr/lib/libCEGUILibxmlParser.la
/usr/lib/libCEGUISILLYImageCodec.la
/usr/lib/libCEGUITinyXMLParser.la
/usr/lib/pkgconfig/
/usr/lib/pkgconfig/CEGUI.pc
/usr/lib/pkgconfig/CEGUI-OPENGL.pc
/usr/lib/pkgconfig/CEGUI-OGRE.pc
/usr/lib/libCEGUIFreeImageImageCodec.la
/usr/lib/libCEGUITGAImageCodec.la
/usr/lib/libCEGUIBase.la
/usr/lib/libCEGUILuaScriptModule.la
/usr/lib/libCEGUIDevILImageCodec.la
/usr/lib/libCEGUIExpatParser.la
/usr/lib/libCEGUIOpenGLRenderer.so
/usr/lib/libCEGUINullRenderer.so
/usr/lib/libCEGUIOgreRenderer.so
/usr/lib/libCEGUIExpatParser.so
/usr/lib/libCEGUIBase.so
/usr/lib/libCEGUISTBImageCodec.so
/usr/lib/libCEGUILuaScriptModule.so
/usr/lib/libCEGUIFreeImageImageCodec.so
/usr/lib/libCEGUILibxmlParser.so
/usr/lib/libCEGUITinyXMLParser.so