torture: Avoid script syntax error when insufficient CPUs

Parentheses are special to bash, so use an overflow flag that doesn't
use them.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
This commit is contained in:
Paul E. McKenney 2015-02-07 20:08:51 -08:00
commit 91afa21d5d