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

[James Henderson via llvm-commits]

================
@@ -24,17 +23,16 @@
 # SINGLE-DAG: PROTECTED   1 protected_global
 # SINGLE-DAG: PROTECTED   1 protected_weak
 
-
-# Check if the visibility of symbols specified by a regex are set correctly,
-# and none of other symbols are affected
+## Check that the visibility of symbols specified by a regex are set correctly,
+# and that no other symbols are affected
----------------
jh7370 wrote:

```suggestion
## and that no other symbols are affected
```

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