Make get_label_info take into account the toolchain for target_gen_dir

tools/gn/ninja_target_writer.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "tools/gn/ninja_target_writer.h"
 
 #include <sstream>
 
 #include "base/files/file_util.h"
 #include "base/strings/string_util.h"
@@ skipping 244 matching lines @@
   // of writing a stamp file for it.
   if (input_deps_sources.size() == 1 && input_deps_targets.size() == 0)
     return OutputFile(settings_->build_settings(), *input_deps_sources[0]);
   if (input_deps_sources.size() == 0 && input_deps_targets.size() == 1) {
     const OutputFile& dep = input_deps_targets[0]->dependency_output_file();
     DCHECK(!dep.value().empty());
     return dep;
   }
 
   // Make a stamp file.
-  OutputFile input_stamp_file(
-      RebasePath(GetTargetOutputDir(target_).value(),
-                 settings_->build_settings()->build_dir(),
-                 settings_->build_settings()->root_path_utf8()));
+  OutputFile input_stamp_file =
+      GetBuildDirForTargetAsOutputFile(target_, BuildDirType::OBJ);
   input_stamp_file.value().append(target_->label().name());
   input_stamp_file.value().append(".inputdeps.stamp");
 
   out_ << "build ";
   path_output_.WriteFile(out_, input_stamp_file);
   out_ << ": "
        << GetNinjaRulePrefixForToolchain(settings_)
        << Toolchain::ToolTypeToName(Toolchain::TYPE_STAMP);
 
   // File input deps.
@@ skipping 37 matching lines @@
        << GetNinjaRulePrefixForToolchain(settings_)
        << Toolchain::ToolTypeToName(Toolchain::TYPE_STAMP);
   path_output_.WriteFiles(out_, files);
 
   if (!order_only_deps.empty()) {
     out_ << " ||";
     path_output_.WriteFiles(out_, order_only_deps);
   }
   out_ << std::endl;
 }