add boot partition size

hc

2023-12-11 d2ccde1c8e90d38cee87a1b0309ad2827f3fd30d

 kernel/tools/testing/selftests/rcutorture/configs/rcu/SRCU-u.boot
..
..
@@ -1 +1,2 @@
1
1
 rcutorture.torture_type=srcud
2
+rcupdate.rcu_self_test=1