Fix a warning about not using a set variable

6a36bcb7945109daebd6464ee6d0a3f6724fb18b fixed similar warnings, but apparently
the tools folder was left out.

Change-Id: If7f889e404264688fa6208afcd3bfdba5a161714
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Alan Alpert <aalpert@blackberry.com>