Always include everything below /usr/share/perl5/Dpkg into dpkg-dev

* debian/dpkg-dev.install: Include everything below /usr/share/perl5/Dpkg
except...
* debian/rules: ... Dpkg/Gettext.pm (-X option of dh_install).

debian/dpkg-dev.install

@@ -61,22 +61,4 @@ usr/share/man/*/*/dpkg-shlibdeps.1
 usr/share/man/*/dpkg-shlibdeps.1
 usr/share/man/*/*/dpkg-source.1
 usr/share/man/*/dpkg-source.1
-usr/share/perl5/Dpkg/Arch.pm
-usr/share/perl5/Dpkg/BuildOptions.pm
-usr/share/perl5/Dpkg/Cdata.pm
-usr/share/perl5/Dpkg/Checksums.pm
-usr/share/perl5/Dpkg/Compression.pm
-usr/share/perl5/Dpkg/Control.pm
-usr/share/perl5/Dpkg/Changelog.pm
-usr/share/perl5/Dpkg/Changelog/Debian.pm
-usr/share/perl5/Dpkg/Deps.pm
-usr/share/perl5/Dpkg/ErrorHandling.pm
-usr/share/perl5/Dpkg/Fields.pm
-usr/share/perl5/Dpkg/IPC.pm
-usr/share/perl5/Dpkg/Path.pm
-usr/share/perl5/Dpkg/Shlibs
-usr/share/perl5/Dpkg/Shlibs.pm
-usr/share/perl5/Dpkg/Source
-usr/share/perl5/Dpkg/Substvars.pm
-usr/share/perl5/Dpkg/Vars.pm
-usr/share/perl5/Dpkg/Version.pm
+usr/share/perl5/Dpkg

debian/rules

@@ -105,7 +105,7 @@ binary-arch: install
 binary-indep: install
 	dh_testdir -i
 	dh_testroot -i
-	dh_install --sourcedir=debian/tmp -i
+	dh_install --sourcedir=debian/tmp -i -XDpkg/Gettext.pm
 
 	dh_installchangelogs -i ChangeLog
 	dh_installdocs -i