locktorture: Make torture scripting account for new _runnable name

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

tools/testing/selftests/rcutorture/configs/lock/ver_functions.sh

@@ -38,6 +38,6 @@ per_version_boot_params () {
 	echo $1 `locktorture_param_onoff "$1" "$2"` \
 		locktorture.stat_interval=15 \
 		locktorture.shutdown_secs=$3 \
-		locktorture.locktorture_runnable=1 \
+		locktorture.torture_runnable=1 \
 		locktorture.verbose=1
 }