/usr/share/perl5/Debian/ is in debhelper 9.20160115ubuntu3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/perl5/Debian/Debhelper/
/usr/share/perl5/Debian/Debhelper/Buildsystem/
/usr/share/perl5/Debian/Debhelper/Buildsystem.pm
/usr/share/perl5/Debian/Debhelper/Buildsystem/ant.pm
/usr/share/perl5/Debian/Debhelper/Buildsystem/autoconf.pm
/usr/share/perl5/Debian/Debhelper/Buildsystem/cmake.pm
/usr/share/perl5/Debian/Debhelper/Buildsystem/makefile.pm
/usr/share/perl5/Debian/Debhelper/Buildsystem/perl_build.pm
/usr/share/perl5/Debian/Debhelper/Buildsystem/perl_makemaker.pm
/usr/share/perl5/Debian/Debhelper/Buildsystem/python_distutils.pm
/usr/share/perl5/Debian/Debhelper/Buildsystem/qmake.pm
/usr/share/perl5/Debian/Debhelper/Buildsystem/qmake_qt4.pm
/usr/share/perl5/Debian/Debhelper/Dh_Buildsystems.pm
/usr/share/perl5/Debian/Debhelper/Dh_Getopt.pm
/usr/share/perl5/Debian/Debhelper/Dh_Lib.pm
/usr/share/perl5/Debian/Debhelper/Dh_Version.pm
/usr/share/perl5/Debian/Debhelper/Sequence/
/usr/share/perl5/Debian/Debhelper/Sequence/python_support.pm