Add debug messages

pkgs/intl4x/tool/generate_hashes.dart

@@ -32,6 +32,8 @@ Future<void> main(List<String> args) async {
         final fileHash = sha256.convert(bytes).toString();
         fileHashes[(os, architecture)] = fileHash;
         print('Hash is $fileHash');
+      } else {
+        print('Could not get library');
       }
     }
   }
@@ -67,6 +69,7 @@ Future<bool> _copyLibrary(
 ) async {
   final fileUri = Directory.current.uri.resolve(folder).resolve(target);
   final file = File.fromUri(fileUri);
+  print('Copy file from ${fileUri.toFilePath()} to ${dynamicLibrary.path}');
   if (await file.exists()) {
     await file.copy(dynamicLibrary.path);
     return true;
@@ -80,6 +83,7 @@ Future<bool> _fetchLibrary(
       'https://github.com/dart-lang/i18n/releases/download/$version/$target');
   final request = await httpClient.getUrl(uri);
   final response = await request.close();
+  print('Fetch file from $uri');
   if (response.statusCode != 200) {
     print('File not found at $uri');
     return false;