OpenRA/OpenRA — pull request #5123 by Mailaender (2014-04-17 15:13:23+00:00)
Title: Additions to Makefile for cleaning up OpenRA.Game/*.dll left-overs

followup of https://github.com/OpenRA/OpenRA/pull/5089 after git status detected these:

```
OpenRA.Game/ICSharpCode.SharpZipLib.dll
OpenRA.Game/OpenRA.FileFormats.dll
OpenRA.Game/OpenRA.FileFormats.dll.mdb
OpenRA.Game/SharpFont.dll
OpenRA.Game/Tao.OpenAl.dll
```