Added versioning borrowed fron GNU Radio to gr-gsm
diff --git a/swig/grgsm_swig.i b/swig/grgsm_swig.i
index 9d6636a..66615e6 100644
--- a/swig/grgsm_swig.i
+++ b/swig/grgsm_swig.i
@@ -29,6 +29,7 @@
 %include "grgsm_swig_doc.i"
 
 %{
+#include "grgsm/constants.h"
 #include "grgsm/receiver/receiver.h"
 #include "grgsm/receiver/clock_offset_control.h"
 #include "grgsm/receiver/cx_channel_hopper.h"
@@ -65,6 +66,8 @@
 #include "grgsm/misc_utils/controlled_fractional_resampler_cc.h"
 %}
 
+%include "constants.i"
+
 %include "grgsm/receiver/receiver.h"
 GR_SWIG_BLOCK_MAGIC2(gsm, receiver);
 %include "grgsm/receiver/clock_offset_control.h"
@@ -140,3 +143,4 @@
 GR_SWIG_BLOCK_MAGIC2(gsm, message_source);
 %include "grgsm/qa_utils/message_sink.h"
 GR_SWIG_BLOCK_MAGIC2(gsm, message_sink);
+