linux: unixbench: fix a typo on logfile name

Change-Id: Ie79eed2ad5f43c48f4d4c793b4c42501b1a01a75
Signed-off-by: Chase Qi <chase.qi@linaro.org>
(cherry picked from commit 12c291dba0d0d54127bec33d491a2268f59faf32)
1 file changed