[lldb][Swift] Adjust SymbolNameFitsToLanguage to upstream changes

The API was changed in llvm#167684
to take `Mangled` by const-ref.

Author: Michael137

lldb/source/Plugins/Language/Swift/SwiftLanguage.cpp

@@ -107,7 +107,7 @@ void SwiftLanguage::Terminate() {
   PluginManager::UnregisterPlugin(CreateInstance);
 }
 
-bool SwiftLanguage::SymbolNameFitsToLanguage(Mangled mangled) const {
+bool SwiftLanguage::SymbolNameFitsToLanguage(const Mangled &mangled) const {
   return SwiftLanguageRuntime::IsSwiftMangledName(
       mangled.GetMangledName().GetStringRef());
 }

lldb/source/Plugins/Language/Swift/SwiftLanguage.h

@@ -134,7 +134,7 @@ class SwiftLanguage : public Language {
 
   static llvm::StringRef GetPluginNameStatic() { return "swift"; }
 
-  bool SymbolNameFitsToLanguage(Mangled mangled) const override;
+  bool SymbolNameFitsToLanguage(const Mangled &mangled) const override;
 
   llvm::StringRef GetInstanceVariableName() override { return "self"; }