Added a type linking from string literals to the string object

UnitNodes.py

@@ -34,6 +34,11 @@ class LiteralNode(ASTNode):
                 self.value = False
             else:
                 self.value = True
+    
+    def linkType(self):
+        if self.name == "java.lang.String":
+            node = self.env.getNode(self.name, "type")
+            self.myType = TypeStruct(self.name, node)
 
 ##################################################################################
 # param type ID