publish ConfigVariableFilename properly

panda/src/express/config_express.N

@@ -15,6 +15,7 @@ forcetype ConfigVariable
 forcetype ConfigVariableBase
 forcetype ConfigVariableBool
 forcetype ConfigVariableDouble
+forcetype ConfigVariableFilename
 forcetype ConfigVariableInt
 forcetype ConfigVariableList
 forcetype ConfigVariableManager

panda/src/express/config_express.h

@@ -34,6 +34,7 @@
 #include "configVariableBase.h"
 #include "configVariableBool.h"
 #include "configVariableDouble.h"
+#include "configVariableFilename.h"
 #include "configVariableInt.h"
 #include "configVariableList.h"
 #include "configVariableManager.h"