AST: Adjust llvm::TinyPtrVector -> llvm::ArrayRef conversion after API change

See llvm/llvm-project@8b3e345.

Author: AnthonyLatsis

lib/AST/ASTContext.cpp

@@ -2499,8 +2499,7 @@ void OverriddenDeclsRequest::cacheResult(
 
   // Record the overrides in the context.
   auto &ctx = decl->getASTContext();
-  auto overriddenCopy =
-    ctx.AllocateCopy(value.operator ArrayRef<ValueDecl *>());
+  auto overriddenCopy = ctx.AllocateCopy(ArrayRef<ValueDecl *>(value));
   (void)ctx.getImpl().Overrides.insert({decl, overriddenCopy});
 }