Use python3 in the Makefile

Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
diff --git a/Makefile b/Makefile
index 69efbdc..d72eaf0 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 
 .PHONY: default build buildext force forceext install installext test testext dist clean
 
-PYTHON=/usr/bin/python
+PYTHON=/usr/bin/python3
 TEST=
 PARAMETERS=