Add an option to enable performance queries in gameini files, disable it by default

Source/Core/VideoCommon/Src/PerfQueryBase.cpp

@@ -1,3 +1,9 @@
 #include "PerfQueryBase.h"
+#include "VideoConfig.h"
 
 PerfQueryBase* g_perf_query = 0;
+
+bool PerfQueryBase::ShouldEmulate() const
+{
+	return g_ActiveConfig.bPerfQueriesEnable;
+}