Add an entry to fix two commits by unknown

Specfically:
c9a049a
1216e90

I assume these belong to Szczepan Faber as his rather unique first
name is embedded in the email address used to commit them.

.mailmap

@@ -56,4 +56,5 @@ Sterling Greene <sterling@gradle.com> <big-guy@users.noreply.github.com>
 Sterling Greene <sterling@gradle.com> <sterling.greene@gmail.com>
 Szczepan Faber <szczepiq@gmail.com>
 Szczepan Faber <szczepiq@gmail.com> <szczepiq@builds.gradle.org>
+Szczepan Faber <szczepiq@gmail.com> <Administrator@szczepan-66b9bf.(none)>
 Tom Eyckmans <teyckmans@gmail.com>