Add missing imports

The one for update-db was dropped in f815d203, whereas tracker_service
has been getting the import from the web_support one. But let's better
be explicit.

1 files changed, 1 insertions, 0 deletions

diff --git a/bin/update-db b/bin/update-db
index e6da4322ed..46368096ba 100755
--- a/bin/update-db
+++ b/bin/update-db
@@ -1,6 +1,7 @@
 #!/usr/bin/python3
 from __future__ import print_function
 
+import os
 import sys
 
 import setup_paths