audio_core: add teakra and lle interface

src/audio_core/lle/lle.h

@@ -0,0 +1,22 @@
+// Copyright 2018 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "audio_core/dsp_interface.h"
+
+namespace AudioCore {
+
+class DspLle final : public DspInterface {
+public:
+    DspLle();
+    ~DspLle();
+
+private:
+    struct Impl;
+    friend struct Impl;
+    std::unique_ptr<Impl> impl;
+};
+
+} // namespace AudioCore