[NaCl SDK] Dereference links before archiving naclmono, fixes Windows build problems

BUG=115363
TEST=manual
R=binji@chromium.org
Review URL: https://chromiumcodereview.appspot.com/10281006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@134799 0039d316-1c4b-4281-b951-d872f2087c98

native_client_sdk/src/build_tools/nacl-mono-archive.py

@@ -49,7 +49,7 @@ def main(args):
   tar_file = None
   buildbot_common.RemoveFile(options.tar_path)
   try:
-    tar_file = tarfile.open(options.tar_path, mode='w:bz2')
+    tar_file = tarfile.open(options.tar_path, mode='w:bz2', dereference=True)
     for subfolder in install_folders:
       tar_file.add(os.path.join(options.install_dir, subfolder),
                    arcname=subfolder)