tests: Fix db_test err file to expect error code name instead of value

Previous commit changed db_test to output code names to fix issues on
some platforms (I guess due to different error code values), but somehow
this log line was not updated.

Fixes: 8b860e54be3dbb6587611a9d61f6d28b4c825697
Change-Id: I598de6f83a86d528174d3d188596314572f5d70d
diff --git a/tests/db/db_test.err b/tests/db/db_test.err
index da67d45..a3e4d58 100644
--- a/tests/db/db_test.err
+++ b/tests/db/db_test.err
@@ -1360,7 +1360,7 @@
 
 sqlite3_step(stmt) --> SQLITE_DONE
 
-db_get_auth_data(dbc, imsi0, &g_aud2g, &g_aud3g, &g_id) --> -126
+db_get_auth_data(dbc, imsi0, &g_aud2g, &g_aud3g, &g_id) --> -ENOKEY
 DAUC IMSI='123456789000000': Error reading Ki, expected length 16 but has length 15
 DAUC IMSI='123456789000000': No 3G Auth Data