mailmap: map Elijah Newren's current and previous work addresses

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Author: newren

.mailmap

@@ -66,6 +66,8 @@ Derrick Stolee <stolee@gmail.com> <dstolee@microsoft.com>
 Deskin Miller <deskinm@umich.edu>
 Đoàn Trần Công Danh <congdanhqx@gmail.com> Doan Tran Cong Danh
 Dirk Süsserott <newsletter@dirk.my1.cc>
+Elijah Newren <newren@gmail.com> <newren@palantir.com>
+Elijah Newren <newren@gmail.com> <newren@github.com>
 Emily Shaffer <nasamuffin@google.com> <emilyshaffer@google.com>
 Eric Blake <eblake@redhat.com> <ebb9@byu.net>
 Eric Hanchrow <eric.hanchrow@gmail.com> <offby1@blarg.net>