MTP Fix rename in Windows

Change-Id: Ieef2fc16aac1da3d03908cfb285895954b42a14a
diff --git a/mtp/btree.hpp b/mtp/btree.hpp
index d6bd0c3..1fa8d28 100755
--- a/mtp/btree.hpp
+++ b/mtp/btree.hpp
@@ -36,6 +36,7 @@
 	Node();
 	void setMtpid(int aMtpid);
 	void setPath(std::string aPath);
+	void rename(std::string aPath);
 	void setLeft(Node* aLeft);
 	void setRight(Node* aRight);
 	void setParent(Node* aParent);