Joshua Nelson eb53eea609 Add json output to -Zdump-mono-stats
This allows analyzing the output programatically; for example, finding
the item with the highest `total_estimate`.

I also took the liberty of adding `untracked` tests to `rustc_session` and documentation to the unstable book for `dump-mono-items`.
2023-01-02 23:02:58 +00:00
..
2022-12-18 14:25:55 +01:00
2023-01-02 23:02:58 +00:00