[OpenTK] Don't call 'LoadAll' on Tizen for discreasing the launching time

Don't call LoadAll on Tizen, LoadAll load the native entry pointer of OpenGLES.
But now OpenTK using dllimport mode on Tizen, it don't need the native entry pointer of OpenGLES.

* Cherry-Picked from https://github.com/Samsung/TizenFX/pull/369

diff --git a/src/OpenTK/GameWindow.cs b/src/OpenTK/GameWindow.cs
index c49fc82..9fa2184 100644 (file)
--- a/src/OpenTK/GameWindow.cs
+++ b/src/OpenTK/GameWindow.cs
@@ -192,8 +192,9 @@ namespace OpenTK
                 this.isSingleThreaded = isSingleThreaded;
                 glContext = new GraphicsContext(mode == null ? GraphicsMode.Default : mode, WindowInfo, major, minor, flags);
                 glContext.MakeCurrent(WindowInfo);
+#if !TIZEN
                 (glContext as IGraphicsContextInternal).LoadAll();
-
+#endif
                 VSync = VSyncMode.On;
 
                 //glWindow.WindowInfoChanged += delegate(object sender, EventArgs e) { OnWindowInfoChangedInternal(e); };