evas: correctly declare filter_internal as public API

I know this is internal. However it is public used in public .eo files.
Even if it is internal, and beta, we still need to expose the API in
order to have it correctly in the .so.

Reviewed-by: Stefan Schmidt <stefan@datenfreihafen.org>
Differential Revision: https://phab.enlightenment.org/D11932

src/lib/evas/canvas/evas_filter_mixin.c

@@ -1,9 +1,7 @@
 #define EFL_CANVAS_FILTER_INTERNAL_PROTECTED
 
-#include "evas_common_private.h"
-#include "evas_private.h"
-#include "../../lib/efl/interfaces/efl_gfx_filter.eo.h"
-#include "efl_canvas_filter_internal.eo.h"
+#include <Evas.h>
+
 #include "evas_filter.h"
 
 #define MY_CLASS EFL_CANVAS_FILTER_INTERNAL_MIXIN

src/lib/evas/include/evas_filter.h

@@ -4,7 +4,6 @@
 #include "evas_common_private.h"
 #include "evas_private.h"
 
-#include "efl_canvas_filter_internal.eo.h"
 
 #ifdef EAPI
 # undef EAPI
@@ -32,6 +31,8 @@
 # endif
 #endif
 
+#include "efl_canvas_filter_internal.eo.h"
+
 #ifdef DEBUG
 # define FILTERS_DEBUG
 #endif