Fix expected test output after new 'logging print file 1' vty command

Ever since libosmocore Change-Id I1c931bff1f1723aa82bead9dfe548e4cc5b685e0
was merged, the VTY tests were broken. Let's fix that by adjusting
the expected test output.

Change-Id: I929ca7f366220b5d1238d43eddc96fa9dde916b6
diff --git a/tests/test_nodes.vty b/tests/test_nodes.vty
index 6de673a..69472e6 100644
--- a/tests/test_nodes.vty
+++ b/tests/test_nodes.vty
@@ -100,6 +100,7 @@
   logging color 1
   logging print category 1
   logging print extended-timestamp 1
+  logging print file 1
   logging level all debug
   logging level main notice
   logging level db notice