Update mailmap

Author: jonas-schievink

.mailmap

@@ -205,6 +205,10 @@ Gareth Daniel Smith <garethdanielsmith@gmail.com> gareth <gareth@gareth-N56VM.(n
 Gareth Daniel Smith <garethdanielsmith@gmail.com> Gareth Smith <garethdanielsmith@gmail.com>
 Gauri Kholkar <f2013002@goa.bits-pilani.ac.in>
 Georges Dubus <georges.dubus@gmail.com> <georges.dubus@compiletoi.net>
+Ghost <ghost> <jonasschievink@gmail.com>
+Ghost <ghost> <jonas.schievink@ferrous-systems.com>
+Ghost <ghost> <jonas@schievink.net>
+Ghost <ghost> <Jonas.Schievink@sony.com>
 Giles Cope <gilescope@gmail.com>
 Glen De Cauwsemaecker <decauwsemaecker.glen@gmail.com>
 Graham Fawcett <graham.fawcett@gmail.com> Graham Fawcett <fawcett@uwindsor.ca>