Allow merged games marked as 'release' to have their save dir directly in the appdata dir

src/modules/filesystem/physfs/wrap_Filesystem.h

@@ -34,6 +34,7 @@ namespace physfs
 {
 	bool hack_setupWriteDirectory();
 	int w_init(lua_State * L);
+	int w_setRelease(lua_State * L);
 	int w_setIdentity(lua_State * L);
 	int w_setSource(lua_State * L);
 	int w_newFile(lua_State * L);