add smoke tests for basic PathBuf interactions I wrote these while debugging [this](https://github.com/rust-lang/miri-test-libstd/actions/runs/8849912635/job/24302962983); it turns out the issue is [more complicated](https://github.com/rust-lang/rust/issues/124409) but these tests still seemed worth keeping. |
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| .. | ||
| extern-so | ||
| fail | ||
| fail-dep | ||
| many-seeds | ||
| panic | ||
| pass | ||
| pass-dep | ||
| utils | ||
| avr.json | ||
| ui.rs | ||