[lld] [lld][elf] Warn if '*' pattern is used multiple times in version scripts (PR #102669)

[Fangrui Song via llvm-commits]

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@@ -311,13 +311,44 @@ void SymbolTable::scanVersionScript() {
 
   // Then, assign versions to "*". In GNU linkers they have lower priority than
   // other wildcards.
+  bool globalAsteriskWildcardFound = false;
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MaskRay wrote:

These variables might look mouthful as asterisk is a wildcard character.
Perhaps AsteriskWildcard => `Asterisk`

https://github.com/llvm/llvm-project/pull/102669