Build: Create a .mailmap with my new name & normalized Jörn's one

mgol · mgol · commit b1f74e7acfb4 · 2017-10-11T11:03:46.000+02:00
diff --git a/.mailmap b/.mailmap
@@ -0,0 +1,2 @@
+Jörn Zaefferer <joern.zaefferer@gmail.com>
+Michał Gołębiowski-Owczarek <m.goleb@gmail.com>

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	`+Jörn Zaefferer <joern.zaefferer@gmail.com>`
	`2`	`+Michał Gołębiowski-Owczarek <m.goleb@gmail.com>`