modify native RenderTexture
modify native RenderTexture

Lanfei/egret-core,SmallAiTT/egret-core,SmallAiTT/egret-core,jiangzhonghui/egret-core,SamuelGavin/egret-core,SamuelGavin/egret-core,Lanfei/egret-core,jiangzhonghui/egret-core