Fixed nogui build.

ConfigManager.h was being indriectly included into SWmain.cpp, but only
when a gui was being built. So we just include it directly.

Source/Plugins/Plugin_VideoSoftware/Src/SWmain.cpp

@@ -31,6 +31,7 @@
 #include "SWStatistics.h"
 #include "HW/VideoInterface.h"
 #include "HW/Memmap.h"
+#include "ConfigManager.h"
 
 #include "OnScreenDisplay.h"
 #define VSYNC_ENABLED 0