/usr/share/phonon/buildsystem/ is in libphonon-dev 4:4.6.0.0-3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/phonon/buildsystem/FindAutomoc4.cmake
/usr/share/phonon/buildsystem/FindPackageHandleStandardArgs.cmake
/usr/share/phonon/buildsystem/FindPhononInternal.cmake
/usr/share/phonon/buildsystem/FindQt4.cmake
/usr/share/phonon/buildsystem/MacroEnsureVersion.cmake
/usr/share/phonon/buildsystem/MacroLogFeature.cmake
/usr/share/phonon/buildsystem/MacroOptionalFindPackage.cmake
/usr/share/phonon/buildsystem/MacroPushRequiredVars.cmake
/usr/share/phonon/buildsystem/PhononMacros.cmake
/usr/share/phonon/buildsystem/Qt4ConfigDependentSettings.cmake
/usr/share/phonon/buildsystem/Qt4Macros.cmake
/usr/share/phonon/buildsystem/cmake_uninstall.cmake.in