.mailmap: add a couple of aliases for Dylan Noblesmith

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/1999>
diff --git a/.mailmap b/.mailmap
index 4d78be0..46b2bb2 100644
--- a/.mailmap
+++ b/.mailmap
@@ -185,6 +185,9 @@
 Dylan Baker <dylanx.c.baker@intel.com> <baker.dylan.c@gmail.com>
 Dylan Baker <dylanx.c.baker@intel.com> <dylan@pnwbakers.com>
 
+Dylan Noblesmith <nobled@dreamwidth.org>
+Dylan Noblesmith <nobled@dreamwidth.org> nobled <nobled2@nobled2-karmic.(none)>
+
 Edward O'Callaghan <funfunctor@folklore1984.net> <eocallaghan@alterapraxis.com>
 
 Elie Tournier <tournier.elie@gmail.com>