Swift: demote wrong assertion

Author: redsun82

swift/extractor/SwiftExtractor.cpp

@@ -41,7 +41,11 @@ static void archiveFile(const SwiftExtractorConfiguration& config, swift::Source
 
   std::error_code ec;
   fs::copy(source, destination, fs::copy_options::overwrite_existing, ec);
-  CODEQL_ASSERT(!ec, "Cannot archive source file {} -> {} ({})", source, destination, ec);
+  if (!ec) {
+    LOG_INFO(
+        "Cannot archive source file {} -> {}, probably a harmless race with another process ({})",
+        source, destination, ec);
+  }
 }
 
 static fs::path getFilename(swift::ModuleDecl& module,