[Lib] Add missing files

Author: tangxifan

libs/librrgraph/src/base/rr_node.cpp

@@ -0,0 +1,11 @@
+#include "rr_node.h"
+#include "rr_graph_storage.h"
+
+//Returns the max 'length' over the x or y direction
+short t_rr_node::length() const {
+    return std::max(
+        storage_->node_yhigh(id_) - storage_->node_ylow(id_),
+        storage_->node_xhigh(id_) - storage_->node_xlow(id_));
+}
+
+