Efl.Canvas: make pointer_iterate a beta API

Gesture framework should implement it.

src/lib/efl/interfaces/efl_canvas.eo

@@ -194,7 +194,7 @@ interface Efl.Canvas ()
          }
       }
       /* FIXME: maybe not necessary if gesture supports this */
-      pointer_iterate @const {
+      pointer_iterate @const @beta {
          [[Returns an iterator over the current known pointer positions.
 
            This is used to iterate over the current known multi-touch positions,

src/lib/elementary/efl_ui_win.c

@@ -13,6 +13,7 @@
 #define EFL_UI_WIN_INLINED_PROTECTED
 #define EFL_UI_FOCUS_OBJECT_PROTECTED
 #define EFL_UI_WIN_BETA
+#define EFL_CANVAS_BETA
 
 #include <Elementary.h>
 #include <Elementary_Cursor.h>

src/tests/elementary/elm_test_win.c

@@ -5,6 +5,8 @@
 #define EFL_ACCESS_BETA
 #define EFL_ACCESS_COMPONENT_BETA
 #define EFL_ACCESS_COMPONENT_PROTECTED
+#define EFL_CANVAS_BETA
+
 #include <Elementary.h>
 #ifdef HAVE_ELEMENTARY_X
 # include <Ecore_X.h>