import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

media/webrtc/trunk/tools/gyp/test/win/lib-flags/ltcg.gyp

@@ -0,0 +1,21 @@
+# Copyright (c) 2012 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.
+
+{
+ 'targets': [
+    {
+      'target_name': 'lib_answer',
+      'type': 'static_library',
+      'msvs_settings': {
+        'VCCLCompilerTool': {
+          'WholeProgramOptimization': 'true',  # /GL
+        },
+        'VCLibrarianTool': {
+          'LinkTimeCodeGeneration': 'true',    # /LTCG
+        },
+      },
+      'sources': ['answer.cc'],
+    },
+  ]
+}