Stop building GLExtensions.cpp twice(One in GL, one in software). We don't need to build it twice, this'll save a bit of time in the build process.

Also a bit of spacing cleanup.

Source/Core/VideoBackends/Software/CMakeLists.txt

@@ -1,27 +1,26 @@
-set(SRCS	../OGL/GLExtensions/GLExtensions.cpp	
-			BPMemLoader.cpp
-			Clipper.cpp
-			SWCommandProcessor.cpp
-			CPMemLoader.cpp
-			DebugUtil.cpp
-			EfbCopy.cpp
-			EfbInterface.cpp
-			HwRasterizer.cpp
-			SWmain.cpp
-			OpcodeDecoder.cpp
-			SWPixelEngine.cpp
-			RasterFont.cpp
-			Rasterizer.cpp
-			SWRenderer.cpp
-			SetupUnit.cpp
-			SWStatistics.cpp
-			Tev.cpp
-			TextureEncoder.cpp
-			TextureSampler.cpp
-			TransformUnit.cpp
-			SWVertexLoader.cpp
-			SWVideoConfig.cpp
-			XFMemLoader.cpp)
+set(SRCS BPMemLoader.cpp
+	   Clipper.cpp
+	   SWCommandProcessor.cpp
+	   CPMemLoader.cpp
+	   DebugUtil.cpp
+	   EfbCopy.cpp
+	   EfbInterface.cpp
+	   HwRasterizer.cpp
+	   SWmain.cpp
+	   OpcodeDecoder.cpp
+	   SWPixelEngine.cpp
+	   RasterFont.cpp
+	   Rasterizer.cpp
+	   SWRenderer.cpp
+	   SetupUnit.cpp
+	   SWStatistics.cpp
+	   Tev.cpp
+	   TextureEncoder.cpp
+	   TextureSampler.cpp
+	   TransformUnit.cpp
+	   SWVertexLoader.cpp
+	   SWVideoConfig.cpp
+	   XFMemLoader.cpp)
 
 if(wxWidgets_FOUND)
 	set(SRCS ${SRCS} VideoConfigDialog.cpp)