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

[Ilia Kuklin via llvm-commits]

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@@ -18,6 +19,9 @@ namespace objcopy {
 struct ELFConfig {
   uint8_t NewSymbolVisibility = (uint8_t)ELF::STV_DEFAULT;
 
+  NameMatcher SymbolsToSetVisibility;
+  uint8_t SetVisibilityType = ELF::STV_DEFAULT;
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kuilpd wrote:

I looked it up and found that "values of unscoped enumeration type can be promoted or converted to integral types", so this is just an implicit conversion.
I can make a PR later that removes that cast in NewSymbolVisibility.

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