Infrastructure: Add a TShader method to publicly expose the intermediate.

glslang/Public/ShaderLang.h

@@ -493,8 +493,8 @@ public:
 
     const char* getInfoLog();
     const char* getInfoDebugLog();
-
     EShLanguage getStage() const { return stage; }
+    TIntermediate* getIntermediate(EShLanguage stage) const { return intermediate; }
 
 protected:
     TPoolAllocator* pool;