Added GameCube Keyboard support.

Source/Core/Core/HW/GCKeyboard.h

@@ -0,0 +1,21 @@
+// Copyright 2013 Dolphin Emulator Project
+// Licensed under GPLv2
+// Refer to the license.txt file included.
+
+#include "Common/CommonTypes.h"
+#include "InputCommon/InputConfig.h"
+#include "InputCommon/KeyboardStatus.h"
+
+#pragma once
+
+namespace Keyboard
+{
+
+void Shutdown();
+void Initialize(void* const hwnd);
+
+InputConfig* GetConfig();
+
+void GetStatus(u8 _port, KeyboardStatus* _pKeyboardStatus);
+
+}