Update .mailmap
diff --git a/.mailmap b/.mailmap
index 56ac529..d1f5ca9 100644
--- a/.mailmap
+++ b/.mailmap
@@ -113,6 +113,7 @@
Heather <heather@cynede.net> <Cynede@Gentoo.org>
Heather <heather@cynede.net> <Heather@cynede.net>
Herman J. Radtke III <herman@hermanradtke.com> Herman J. Radtke III <hermanradtke@gmail.com>
+Hirochika Matsumoto <git@hkmatsumoto.com> <matsujika@gmail.com>
Ian Jackson <ijackson@chiark.greenend.org.uk> <ian.jackson@citrix.com>
Ian Jackson <ijackson@chiark.greenend.org.uk> <ijackson+github@slimy.greenend.org.uk>
Ian Jackson <ijackson@chiark.greenend.org.uk> <iwj@xenproject.org>
