Fixed an issue in UWP export caused by duplicate entry for extensions in content types file.
Fixed an issue in UWP export caused by duplicate entry for extensions in content types file.

(cherry picked from commit 9cb46ed4e7e3a25132fff3d7c80be4e47cedb22f)

ex/godot,ex/godot,ex/godot,ex/godot,ex/godot,ex/godot,ex/godot,ex/godot