Adding support for debug variables translation

Additionally, adding flag to override gdi

Change-Id: I52759aa8c5f1149a34167429289d3f3876cdcb92

runtime/os_interface/windows/environment_variables.h

@@ -0,0 +1,12 @@
+/*
+ * Copyright (C) 2019 Intel Corporation
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ */
+
+#pragma once
+
+#include <cstdint>
+
+uint32_t getEnvironmentVariable(const char *name, char *outBuffer, uint32_t outBufferSize);