- Optimization in CCClippingNode.
Disable visiting when no objects has to be drawn under stencil.
- set const modifier to ClippingNode::hasContent()
Merge pull request #9082 from Teivaz/v3

- Optimization in CCClippingNode.
[AUTO]: updating luabinding automatically
Merge pull request #9174 from CocosRobot/update_lua_bindings_1416454764

[AUTO]: updating luabinding automatically
Merge branch 'cocos_v3' into v3