[llvm] [llvm][lit] Add option to run only the failed tests (PR #158043)

[James Henderson via llvm-commits]

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@@ -0,0 +1,18 @@
+# Checks that --filter-failed won't re-run tests that have passed
+# since the last time --filter-failed has run.
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jh7370 wrote:

```suggestion
# since the last time --filter-failed was run.
```

https://github.com/llvm/llvm-project/pull/158043