Non-deterministic output in basic-fail

[RalfJung]

This failed at least twice today, with the same diff:

   --- tests/integrations/basic-fail/Cargo.stdout
  +++ <stdout output>
   
   running 0 tests
  ... 662 lines skipped ...
   tests/actual_tests_bless/revisions.rs (revision `bar`) ... ok
   tests/actual_tests_bless/revisions_bad.rs ... ok
  +tests/actual_tests_bless/revisions_filter.rs ... ok
   tests/actual_tests_bless/revisions_bad.rs (revision `foo`) ... ok
   tests/actual_tests_bless/revisions_bad.rs (revision `bar`) ... FAILED
  -tests/actual_tests_bless/revisions_filter.rs ... ok
   tests/actual_tests_bless/revisions_filter.rs (revision `foo`) ... ignored (in-test comment)
   tests/actual_tests_bless/revisions_filter.rs (revision `bar`) ... ignored (in-test comment)
  ... 1371 lines skipped ...

• add missing Cargo.toml to linkedProjects #333 (comment)
• CI: ensure integration test lockfiles are up-to-date #334 (comment)