Add Richard Eisenberg's new email to mailmap

Reviewers: austin, mpickering

Reviewed By: mpickering

Subscribers: thomie

Differential Revision: https://phabricator.haskell.org/D2689

.mailmap

@@ -201,7 +201,8 @@ Peter Wortmann          <scpmw@leeds.ac.uk>                 scpmw@leeds.ac.uk <u
 Ralf Laemmel            <softlang@uni-koblenz.de>           ralf <unknown> # https://ghc.haskell.org/trac/ghc/wiki/TeamGHC
 Ravi Nanavati           <ravi@bluespec.com>                 # Commit 70c044.
 Reuben Thomas           <rrt@sc3d.org>                      rrt <unknown>
-Richard Eisenberg       <eir@cis.upenn.edu>                 <eir@seas.upenn.edu>
+Richard Eisenberg       <rae@cs.brynmawrn.edu>              <eir@seas.upenn.edu>
+Richard Eisenberg       <eir@cis.upenn.edu>                 <rae@cs.brynmawr.edu>
 Rob Ennals              <rob@ennals.org>                    rje <unknown> # SPJ's student (rje33@cam.ac.uk)
 Roman Leshchinskiy      <rl@cse.unsw.edu.au>                rl@cse.unsw.edu.au <unknown>
 Ross Paterson           <ross@soi.city.ac.uk>               ross <unknown>