Fix warning in x64CPUDetect.cpp in generic build by not building it.

Source/Core/Common/GenericCPUDetect.cpp

@@ -0,0 +1,14 @@
+// Copyright 2013 Dolphin Emulator Project
+// Licensed under GPLv2
+// Refer to the license.txt file included.
+
+#include "Common/CPUDetect.h"
+
+CPUInfo cpu_info;
+
+CPUInfo::CPUInfo() {}
+
+std::string CPUInfo::Summarize()
+{
+	return "Generic";
+}