fixed cannot set blendfunc to Armature
Merge branch 'v3' of https://github.com/cocos2d/cocos2d-x into v3
fixed black edge in Armature
fixed armature blendfunc effect
Merge pull request #7576 from dabingnn/v3_fixWindowsCompileError

V3 fix windows compile error
Merge pull request #7568 from 2youyouo2/v3

fixed init Armature blendfunc state