GN: Strip NaCl IRT and save its .debug file

ppapi/native_client/irt_debuglink.py

Index: ppapi/native_client/irt_debuglink.py
diff --git a/ppapi/native_client/irt_debuglink.py b/ppapi/native_client/irt_debuglink.py
new file mode 100755
index 0000000000000000000000000000000000000000..a68b67be17682dfd9e2f02cc6d5f65a1fe4a1c02
--- /dev/null
+++ b/ppapi/native_client/irt_debuglink.py
@@ -0,0 +1,21 @@
+#!/usr/bin/env python
+# Copyright (c) 2015 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.
+
+"""Run objcopy --add-gnu-debuglink for the NaCl IRT.
+"""
+
+import subprocess
+import sys
+
+
+def Main(args):
+  objcopy, debug_file, stripped_file, output_file = args
+  return subprocess.call([
+      objcopy, '--add-gnu-debuglink', debug_file, stripped_file, output_file
+      ])
+
+
+if __name__ == '__main__':
+  sys.exit(Main(sys.argv[1:]))