- renamed hle_syscall to just syscall

- added service.h as an initial service interface

src/core/hle/syscall.h

@@ -0,0 +1,19 @@
+// Copyright 2014 Citra Emulator Project
+// Licensed under GPLv2
+// Refer to the license.txt file included.  
+
+#pragma once
+
+#include "common/common_types.h"
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+// Namespace Syscall
+
+namespace Syscall {
+
+typedef u32 Handle;
+typedef s32 Result;
+
+void Register();
+
+} // namespace