Merge pull request #1 from cocos2d/v3

Cocos2d-x Merge
Fixed winrt DLL link errors when using extern consts
Merge pull request #8960 from kyokomi/feature/CSLoader_setPropsForNodeFromProtocolBuffers

bugfix: setting forget the contentSize.
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Merge pull request #8961 from Appgeneration/winrt_link_fix

Winrt link fix