Fix group datadeps

tools/gn/ninja_group_target_writer.cc

Index: tools/gn/ninja_group_target_writer.cc
diff --git a/tools/gn/ninja_group_target_writer.cc b/tools/gn/ninja_group_target_writer.cc
index 6a02cf1eb023340b74e3966204c405777066f458..1b1c30057c1277cd0d66305ae7f589ba21d6dbc1 100644
--- a/tools/gn/ninja_group_target_writer.cc
+++ b/tools/gn/ninja_group_target_writer.cc
@@ -28,7 +28,7 @@ void NinjaGroupTargetWriter::Run() {
   std::vector<OutputFile> data_output_files;
   const LabelTargetVector& datadeps = target_->datadeps();
   for (size_t i = 0; i < datadeps.size(); i++)
-    data_output_files.push_back(deps[i].ptr->dependency_output_file());
+    data_output_files.push_back(datadeps[i].ptr->dependency_output_file());
 
   WriteStampForTarget(output_files, data_output_files);
 }