[llvm] [llvm-objcopy] Add llvm-objcopy option --set-visibility-sym (PR #80872)

[James Henderson via llvm-commits]

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@@ -0,0 +1,19 @@
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+# Check if symbols with SHN_UNDEF index are ignored when setting visibility
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jh7370 wrote:

```suggestion
# Check that symbols with SHN_UNDEF index are ignored when setting visibility
```

https://github.com/llvm/llvm-project/pull/80872