Fix: xcode-ninja should copy the product extension to the wrapper project

pylib/gyp/xcode_ninja.py

Index: pylib/gyp/xcode_ninja.py
diff --git a/pylib/gyp/xcode_ninja.py b/pylib/gyp/xcode_ninja.py
index 57e73c64fd7d03f40d13eee9226af3c84df91be9..0aae9bd23bb794ec2c609dce9d8f3fe313ef13cb 100644
--- a/pylib/gyp/xcode_ninja.py
+++ b/pylib/gyp/xcode_ninja.py
@@ -67,10 +67,13 @@ def _TargetFromSpec(old_spec, params):
 
   target_name = old_spec.get('target_name')
   product_name = old_spec.get('product_name', target_name)
+  product_extension = old_spec.get('product_extension')
 
   ninja_target = {}
   ninja_target['target_name'] = target_name
   ninja_target['product_name'] = product_name
+  if product_extension:
+    ninja_target['product_extension'] = product_extension
   ninja_target['toolset'] = old_spec.get('toolset')
   ninja_target['default_configuration'] = old_spec.get('default_configuration')
   ninja_target['configurations'] = {}