Duplicate source files for Vulkan.

The Vulkan implementation needs a directory for each architectural
layer, similar to the OpenGL ES stack. The entire rendering stack is
duplicated, leaving only Reactor common between them:

Renderer -> Device
Shader -> Pipeline
Common -> System
Main -> WSI

Bug b/117152542

Change-Id: I9c26b23654016d637f88ec2416f019ef65b9afbd
Reviewed-on: https://swiftshader-review.googlesource.com/c/21248
Reviewed-by: Alexis Hétu <sugoi@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>
diff --git a/src/Device/RoutineCache.hpp b/src/Device/RoutineCache.hpp
new file mode 100644
index 0000000..74dd842
--- /dev/null
+++ b/src/Device/RoutineCache.hpp
@@ -0,0 +1,49 @@
+// Copyright 2016 The SwiftShader Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef sw_RoutineCache_hpp
+#define sw_RoutineCache_hpp
+
+#include "LRUCache.hpp"
+
+#include "Reactor/Reactor.hpp"
+
+namespace sw
+{
+	template<class State>
+	class RoutineCache : public LRUCache<State, Routine>
+	{
+	public:
+		RoutineCache(int n, const char *precache = 0);
+		~RoutineCache();
+
+	private:
+		const char *precache;
+		#if defined(_WIN32)
+		HMODULE precacheDLL;
+		#endif
+	};
+
+	template<class State>
+	RoutineCache<State>::RoutineCache(int n, const char *precache) : LRUCache<State, Routine>(n), precache(precache)
+	{
+	}
+
+	template<class State>
+	RoutineCache<State>::~RoutineCache()
+	{
+	}
+}
+
+#endif   // sw_RoutineCache_hpp