Added lua scripts and fixed a typo in state machine code

LuaScripts/Chapter5_VerifyLinkedList.lua

@@ -0,0 +1,23 @@
+function _verifyLinkedList(address)
+    local nextItem = readInteger(address) or 0
+    local previousItem = readInteger(address + 4) or 0
+    local nextItemBack = readInteger(nextItem + 4)
+    local previousItemForward = readInteger(previousItem)
+
+    return (address == nextItemBack
+            and address == previousItemForward)
+end
+
+function isValueInLinkedList(valueAddress)
+    for address = valueAddress - 8, valueAddress - 48, -4 do
+        if (_verifyLinkedList(address)) then
+            return address
+        end
+    end
+    return 0
+end
+
+local node = isValueInLinkedList(addressOfSomeValue)
+if (node > 0) then
+    print(string.format("Value in LL, top of node at 0x0%x", node))
+end