.mailmap: add a few aliases for Kristian Høgsberg

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/1999>
diff --git a/.mailmap b/.mailmap
index 20423e7..b16a821 100644
--- a/.mailmap
+++ b/.mailmap
@@ -356,6 +356,9 @@
 Kristian Høgsberg <krh@bitplanet.net> <hoegsberg@chromium.org>
 Kristian Høgsberg <krh@bitplanet.net> <hoegsberg@google.com>
 Kristian Høgsberg <krh@bitplanet.net> <hoegsberg@gmail.com>
+Kristian Høgsberg <krh@bitplanet.net> <krh@sweater.jf.intel.com>
+Kristian Høgsberg <krh@bitplanet.net> <krh@bitplanet.net>
+Kristian Høgsberg <krh@bitplanet.net> <krh@owl.jf.intel.com>
 
 Krzesimir Nowak <qdlacz@gmail.com> <krzesimir@kinvolk.io>