I've fixed this now, please see the attached diff.
Best,
DS
--
4096R/DF5182C8
http://www.danielstender.com/blog/
diff -Nru dh-buildinfo-0.11/buildinfo.pm dh-buildinfo-0.11+nmu1/buildinfo.pm
--- dh-buildinfo-0.11/buildinfo.pm 1970-01-01 01:00:00.000000000 +0100
+++ dh-buildinfo-0.11+nmu1/buildinfo.pm 2016-04-03 22:55:49.000000000 +0200
@@ -0,0 +1,11 @@
+#!/usr/bin/perl
+# debhelper addon script for dh-buildinfo
+# written in 2016 by Daniel Stender <sten...@debian.org>
+
+use warnings;
+use strict;
+use Debian::Debhelper::Dh_Lib;
+
+insert_after("dh_installdocs", "dh_buildinfo");
+
+1
diff -Nru dh-buildinfo-0.11/debian/changelog dh-buildinfo-0.11+nmu1/debian/changelog
--- dh-buildinfo-0.11/debian/changelog 2014-05-17 23:45:40.000000000 +0200
+++ dh-buildinfo-0.11+nmu1/debian/changelog 2016-04-03 23:00:26.000000000 +0200
@@ -1,3 +1,10 @@
+dh-buildinfo (0.11+nmu1) unstable; urgency=medium
+
+ * Non-maintainer upload.
+ * Added sequencer script buildinfo.pm (Closes: #570933).
+
+ -- Daniel Stender <sten...@debian.org> Sun, 03 Apr 2016 23:00:18 +0200
+
dh-buildinfo (0.11) unstable; urgency=medium
* Avoid dups in "pulled by" lines, and sort contents of those for output
diff -Nru dh-buildinfo-0.11/debian/rules dh-buildinfo-0.11+nmu1/debian/rules
--- dh-buildinfo-0.11/debian/rules 2014-05-17 23:44:54.000000000 +0200
+++ dh-buildinfo-0.11+nmu1/debian/rules 2016-04-03 23:01:14.000000000 +0200
@@ -43,7 +43,9 @@
dh_installdirs
$(MAKE) install DESTDIR=$(TMP)
-
+ mkdir -p $(TMP)/usr/share/perl5/Debian/Debhelper/Sequence
+ mv $(TMP)/usr/share/perl5/buildinfo.pm $(TMP)/usr/share/perl5/Debian/Debhelper/Sequence/
+ # not the tip of elegance but I don't know how to install this properly with Module::Build
# Build architecture-dependent files here.
binary-arch: build install
