Update mailmap for Joe Gordon

Update mailmap to reflect that I am committing from a new email address.

Change-Id: I8d21f85f7306d5f926099a3b9ea047706c4af0d7
diff --git a/.mailmap b/.mailmap
index 9a22c71..5c37a5e 100644
--- a/.mailmap
+++ b/.mailmap
@@ -2,6 +2,7 @@
 Ravikumar Venkatesan <ravikumar.venkatesan@hp.com> ravikumar venkatesan <ravikumar.venkatesan@hp.com>
 Rohit Karajgi <rohit.karajgi@nttdata.com> Rohit Karajgi <rohit.karajgi@vertex.co.in>
 Jay Pipes <jaypipes@gmail.com> Jay Pipes <jpipes@librebox.gateway.2wire.net>
+Joe Gordon <joe.gordon0@gmail.com> <jogo@cloudscaling.com>
 <brian.waldon@rackspace.com> <bcwaldon@gmail.com>
 Daryl Walleck <daryl.walleck@rackspace.com> dwalleck <daryl.walleck@rackspace.com>
 <jeblair@hp.com> <corvus@inaugust.com>