Add PLACE_FILE_EXPORTER to swig to call in python

pcbnew/python/swig/pcbnew.i

@@ -71,6 +71,7 @@ class BASE_SET {};
 #include <plotcontroller.h>
 #include <pcb_plot_params.h>
 #include <exporters/export_d356.h>
+#include <exporters/export_footprints_placefile.h>
 #include <exporters/export_vrml.h>
 #include <exporters/gendrill_file_writer_base.h>
 #include <exporters/gendrill_Excellon_writer.h>
@@ -115,6 +116,7 @@ HANDLE_EXCEPTIONS(PLUGIN::FootprintDelete)
 %include <pcb_plot_params.h>
 %include <plotters/plotter.h>
 %include <exporters/export_d356.h>
+%include <exporters/export_footprints_placefile.h>
 %include <exporters/export_vrml.h>
 %include <exporters/gendrill_file_writer_base.h>
 %include <exporters/gendrill_Excellon_writer.h>