fix compilation error in test_fasm

Author: soheilshahrouz

utils/fasm/test/test_fasm.cpp

@@ -192,7 +192,7 @@ static std::string get_pin_feature (size_t inode) {
     // Get tile physical tile and the pin number
     int ilow = rr_graph.node_xlow(RRNodeId(inode));
     int jlow = rr_graph.node_ylow(RRNodeId(inode));
-    int layer_num = rr_graph.node_layer(RRNodeId(inode));
+    int layer_num = rr_graph.node_layer_low(RRNodeId(inode));
     auto physical_tile = device_ctx.grid.get_physical_type({ilow, jlow, layer_num});
     int pin_num = rr_graph.node_pin_num(RRNodeId(inode));