Fix line endings in upgrade rules files

- Use unix line endings
- No "\n" at the end of a message

OpenRA.Mods.Common/UpdateRules/Rules/DefineSoundDefaults.cs

@@ -9,7 +9,7 @@
  */
 #endregion
 
-using System;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 

OpenRA.Mods.Common/UpdateRules/Rules/RemoveWithReloadingSpriteTurret.cs

@@ -21,7 +21,7 @@ namespace OpenRA.Mods.Common.UpdateRules.Rules
 			get
 			{
 				return "WithReloadingSpriteTurret has been superseded by conditions.\n" +
-					"The trait is switched for with WithSpriteTurret.\n";
+					"The trait is switched for with WithSpriteTurret.";
 			}
 		}
 

OpenRA.Mods.Common/UpdateRules/UpdateRule.cs

@@ -9,7 +9,7 @@
  */
 #endregion
 
-using System;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 

OpenRA.Mods.Common/UpdateRules/UpdateUtils.cs

@@ -9,7 +9,7 @@
  */
 #endregion
 
-using System;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;