efl/evas_w32/engine: Add interface name and version.

Again they are already used but nobody did bother to declare or define them.
I have choosen the name with what came into my head first and version seem
to be 1 in other engines, too. Evas engine gods please review.

SVN revision: 83826

src/modules/ecore_evas/engines/win32/ecore_evas_win32.c

@@ -36,7 +36,8 @@
 static int _ecore_evas_init_count = 0;
 
 static Ecore_Event_Handler *ecore_evas_event_handlers[ECORE_EVAS_EVENT_COUNT];
-
+static const char *interface_win32_name = "win32";
+static const int   interface_win32_version = 1;
 
 typedef struct _Ecore_Evas_Engine_Data_Win32 Ecore_Evas_Engine_Data_Win32;