sync: add missing os module import

fixes: openbmc/openbmc#641

Change-Id: I88dbcfb6d731bff66d7edf4866b61ede06f4c6f8
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/pyinventorymgr/sync_inventory_items.py b/pyinventorymgr/sync_inventory_items.py
index 72852a5..1354b5a 100644
--- a/pyinventorymgr/sync_inventory_items.py
+++ b/pyinventorymgr/sync_inventory_items.py
@@ -17,6 +17,7 @@
 
 
 import sys
+import os
 import dbus
 import argparse
 import subprocess