Build: Add my new name to .mailmap

Author: mgol

.mailmap

@@ -78,6 +78,7 @@ Max Schnur <max.schnur@gmail.com>
 Michael Hollis <hollis21@gmail.com>
 Michael Stay <metaweta@gmail.com>
 Michael Wu <michaelmwu@gmail.com>
+Michał Gołębiowski-Owczarek <m.goleb@gmail.com>
 Mike Alsup <malsup@gmail.com>
 Milan Broum <midlis@googlemail.com>
 Mohamed Cherif Bouchelaghem <cherifbouchelaghem@yahoo.fr> <cherif@cherif.(none)>