Move the JIT registration logic in its own file

Move the JITed function/basic-block registration logic out of the CPU
subsystem in order to add JIT registration to JITed DSP and
Video/VertexLoader code.

This necessary in order to add /tmp/perf-$pid.map support to other
JITed code as they need to write to the same file.

Source/Core/Common/JitRegister.h

@@ -0,0 +1,15 @@
+// Copyright 2014 Dolphin Emulator Project
+// Licensed under GPLv2
+// Refer to the license.txt file included.
+
+#pragma once
+
+namespace JitRegister
+{
+
+void Init();
+void Shutdown();
+void Register(const void* base_address, u32 code_size,
+	const char* name, u32 original_address=0);
+
+}