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

test/ldflags-duplicates/test.gyp

Index: test/ldflags-duplicates/test.gyp
diff --git a/test/ldflags-duplicates/test.gyp b/test/ldflags-duplicates/test.gyp
new file mode 100644
index 0000000000000000000000000000000000000000..c36835b18f0f774e6b55efcda31dcf2cdbbfa8e1
--- /dev/null
+++ b/test/ldflags-duplicates/test.gyp
@@ -0,0 +1,45 @@
+# 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.
+
+{
+  'make_global_settings': [
+    ['LINK_wrapper', './check-ldflags.py'],
+  ],
+  'targets': [
+    {
+      'target_name': 'test',
+      'type': 'executable',
+      'ldflags': [
+        '-Wl,--whole-archive <(PRODUCT_DIR)/lib1.a',
+        '-Wl,--no-whole-archive',
+
+        '-Wl,--whole-archive <(PRODUCT_DIR)/lib2.a',
+        '-Wl,--no-whole-archive',
+      ],
+      'dependencies': [
+        'lib1',
+        'lib2',
+      ],
+      'sources': [
+        'main.c',
+      ],
+    },
+    {
+      'target_name': 'lib1',
+      'type': 'static_library',
+      'standalone_static_library': 1,
+      'sources': [
+        'lib1.c',
+      ],
+    },
+    {
+      'target_name': 'lib2',
+      'type': 'static_library',
+      'standalone_static_library': 1,
+      'sources': [
+        'lib2.c',
+      ],
+    },
+  ],
+}