Switch to python3

Signed-off-by: Tom Joseph <tomjoseph@in.ibm.com>
Change-Id: I86ca25173c745442760eddd608ad48985cd46ee0
diff --git a/scripts/fru_gen.py b/scripts/fru_gen.py
index a8d148a..4375086 100755
--- a/scripts/fru_gen.py
+++ b/scripts/fru_gen.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 import os
 import sys