DolphinWX Config: mark JITIL as slower to remove a source of confusion for users.

Source/Core/DolphinWX/ConfigMain.cpp

@@ -67,7 +67,7 @@ const CPUCore CPUCores[] = {
 	{4, wxTRANSLATE("Arm JITIL (experimental)")},
 #else
 	{1, wxTRANSLATE("JIT Recompiler (recommended)")},
-	{2, wxTRANSLATE("JITIL Recompiler (experimental)")},
+	{2, wxTRANSLATE("JITIL Recompiler (slower, experimental)")},
 #endif
 };