db: Add testcase for the db migration.
diff --git a/openbsc/tests/db/db_test.err b/openbsc/tests/db/db_test.err
new file mode 100644
index 0000000..0a0f2f3
--- /dev/null
+++ b/openbsc/tests/db/db_test.err
@@ -0,0 +1,2 @@
+<000d> db.c:274 Going to migrate from revision 3
+
\ No newline at end of file