Do not remote duplicate entries from ldflags when generating ninja files as it changes behavior

test/ldflags-duplicates/gyptest-ldflags-duplicates.py

Index: test/ldflags-duplicates/gyptest-ldflags-duplicates.py
diff --git a/test/msvs/rules_stdout_stderr/rule_stderr.py b/test/ldflags-duplicates/gyptest-ldflags-duplicates.py
similarity index 52%
copy from test/msvs/rules_stdout_stderr/rule_stderr.py
copy to test/ldflags-duplicates/gyptest-ldflags-duplicates.py
index f4860624f3daef32a3aae72b3570700643f2857e..61b9f1282333de5e53dcd9e13a92a5a1c3f577ff 100644
--- a/test/msvs/rules_stdout_stderr/rule_stderr.py
+++ b/test/ldflags-duplicates/gyptest-ldflags-duplicates.py
@@ -1,7 +1,17 @@
 #!/usr/bin/env python
+
 # Copyright (c) 2015 Google Inc. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-import sys
-print >>sys.stderr, "This will go to stderr"
+"""
+Verifies duplicate ldflags are not removed.
+"""
+
+import TestGyp
+
+test = TestGyp.TestGyp()
+test.run_gyp('test.gyp')
+test.build('test.gyp')
+
+test.pass_test()