/usr/share/qt4/mkspecs/features/symbian/ is in qt4-qmake 4:4.8.1-0ubuntu4.
This file is owned by root:root, with mode 0o755.
..
/usr/share/qt4/mkspecs/features/symbian/add_mmp_rules.prf
/usr/share/qt4/mkspecs/features/symbian/application_icon.prf
/usr/share/qt4/mkspecs/features/symbian/armcc_warnings.prf
/usr/share/qt4/mkspecs/features/symbian/data_caging_paths.prf
/usr/share/qt4/mkspecs/features/symbian/debug.prf
/usr/share/qt4/mkspecs/features/symbian/def_files.prf
/usr/share/qt4/mkspecs/features/symbian/def_files_disabled.prf
/usr/share/qt4/mkspecs/features/symbian/default_post.prf
/usr/share/qt4/mkspecs/features/symbian/default_pre.prf
/usr/share/qt4/mkspecs/features/symbian/do_not_build_as_thumb.prf
/usr/share/qt4/mkspecs/features/symbian/epocallowdlldata.prf
/usr/share/qt4/mkspecs/features/symbian/localize_deployment.prf
/usr/share/qt4/mkspecs/features/symbian/moc.prf
/usr/share/qt4/mkspecs/features/symbian/nested_exceptions.prf
/usr/share/qt4/mkspecs/features/symbian/opengl.prf
/usr/share/qt4/mkspecs/features/symbian/platform_paths.prf
/usr/share/qt4/mkspecs/features/symbian/prepend_includepath.prf
/usr/share/qt4/mkspecs/features/symbian/qt.prf
/usr/share/qt4/mkspecs/features/symbian/qt_config.prf
/usr/share/qt4/mkspecs/features/symbian/release.prf
/usr/share/qt4/mkspecs/features/symbian/run_on_phone.prf
/usr/share/qt4/mkspecs/features/symbian/sis_targets.prf
/usr/share/qt4/mkspecs/features/symbian/stl.prf
/usr/share/qt4/mkspecs/features/symbian/stl_off.prf
/usr/share/qt4/mkspecs/features/symbian/symbian_appbooster.prf
/usr/share/qt4/mkspecs/features/symbian/symbian_building.prf
/usr/share/qt4/mkspecs/features/symbian/thread.prf