/usr/share/phonon4qt5/buildsystem/ is in libphonon4qt5-dev 4:4.8.3-0ubuntu3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/phonon4qt5/buildsystem/COPYING-CMAKE-SCRIPTS
/usr/share/phonon4qt5/buildsystem/FindAutomoc4.cmake
/usr/share/phonon4qt5/buildsystem/FindPackageHandleStandardArgs.cmake
/usr/share/phonon4qt5/buildsystem/FindPhononInternal.cmake
/usr/share/phonon4qt5/buildsystem/MacroEnsureVersion.cmake
/usr/share/phonon4qt5/buildsystem/MacroLogFeature.cmake
/usr/share/phonon4qt5/buildsystem/MacroOptionalFindPackage.cmake
/usr/share/phonon4qt5/buildsystem/MacroPushRequiredVars.cmake
/usr/share/phonon4qt5/buildsystem/PhononMacros.cmake
/usr/share/phonon4qt5/buildsystem/PhononQt4.cmake
/usr/share/phonon4qt5/buildsystem/PhononQt5.cmake
/usr/share/phonon4qt5/buildsystem/cmake_uninstall.cmake.in