rcutorture: Create config files for scripted test-the-test testing

This commit adds a pair of files in the configs directory to allow
test-the-test runs of rcutorture via a "--configs BUSTED" argument to
the kvm.sh script.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>

diff --cc tools/testing/selftests/rcutorture/configs/BUSTED
Simple merge

diff --cc tools/testing/selftests/rcutorture/configs/BUSTED.boot
Simple merge