[app] change the app api to have an init and entry point
diff --git a/app/tests/tests.c b/app/tests/tests.c
index 9e04918..1a8130b 100644
--- a/app/tests/tests.c
+++ b/app/tests/tests.c
@@ -35,12 +35,12 @@
 
 #endif
 
-static void tests_init(const struct _app_descriptor *app, void *args)
+static void tests_init(const struct app_descriptor *app)
 {
 }
 
 APP_START(tests)
-	.entry = tests_init,
-	.flags = APP_FLAG_BOOT_START,
+	.init = tests_init,
+	.flags = 0,
 APP_END