OpenGL: Mute nvidia performance warning about stalling the GPU.

They are right, our perf query implementation is terrible.
But raising a warning makes it just even slower.

Source/Core/VideoBackends/OGL/Render.cpp

@@ -84,6 +84,11 @@ static void APIENTRY ErrorCallback(GLenum source, GLenum type, GLuint id, GLenum
   const char* s_source;
   const char* s_type;
 
+  // Performance - DualCore driver performance warning:
+  // DualCore application thread syncing with server thread
+  if (id == 0x200b0)
+    return;
+
   switch (source)
   {
   case GL_DEBUG_SOURCE_API_ARB: