Fix building with PCH disabled.

Source/Core/Core/IPC_HLE/WII_IPC_HLE_Device_usb_bt_real.cpp

@@ -2,6 +2,7 @@
 // Licensed under GPLv2+
 // Refer to the license.txt file included.
 
+#include <algorithm>
 #include <iomanip>
 #include <map>
 #include <memory>

Source/Core/VideoBackends/Software/SetupUnit.cpp

@@ -2,6 +2,8 @@
 // Licensed under GPLv2+
 // Refer to the license.txt file included.
 
+#include <cstring>
+
 #include "VideoBackends/Software/SetupUnit.h"
 
 #include "Common/Logging/Log.h"