Updated DX12 stub.

src/renderer_d3d12.cpp

@@ -0,0 +1,18 @@
+/*
+ * Copyright 2011-2015 Branimir Karadzic. All rights reserved.
+ * License: http://www.opensource.org/licenses/BSD-2-Clause
+ */
+
+#include "bgfx_p.h"
+
+namespace bgfx
+{
+	RendererContextI* rendererCreateD3D12()
+	{
+		return NULL;
+	}
+
+	void rendererDestroyD3D12()
+	{
+	}
+} // namespace bgfx