fix compilation error on savi3

Author: soheilshahrouz

vpr/src/base/ShowSetup.h

@@ -4,8 +4,8 @@
 #include <string>
 #include <vector>
 
-class t_logical_block_type;
-class t_vpr_setup;
+struct t_logical_block_type;
+struct t_vpr_setup;
 
 struct ClusteredNetlistStats {
   private:

vpr/src/base/vpr_api.cpp

@@ -55,6 +55,7 @@
 #include "pb_type_graph.h"
 #include "route.h"
 #include "route_export.h"
+#include "route_common.h"
 #include "vpr_api.h"
 #include "read_sdc.h"
 #include "power.h"