Fix CCRenderTexture crash on windows DX platforms due to MonoGame changing the enum values of Microsoft.Xna.Framework.Graphics.DepthFormat.  We were passing the wrong values causing an invalid value being passed to SharpDX.Direct3D11.Texture2D.
Fix CCRenderTexture crash on windows DX platforms due to MonoGame changing the enum values of Microsoft.Xna.Framework.Graphics.DepthFormat.  We were passing the wrong values causing an invalid value being passed to SharpDX.Direct3D11.Texture2D.

haithemaraissia/CocosSharp,MSylvia/CocosSharp,zmaruo/CocosSharp,mono/CocosSharp,haithemaraissia/CocosSharp,zmaruo/CocosSharp,TukekeSoft/CocosSharp,TukekeSoft/CocosSharp,MSylvia/CocosSharp,mono/CocosSharp