CRAS: unittest - Fix memory leak in empty_iodev_unittest

BUG=chromium:949869
TEST=USE=asan FEATURES=test emerge-atlas admd

Change-Id: Ib79c5df94b6eaa35f1c5894856100661cd2996a0
Reviewed-on: https://chromium-review.googlesource.com/1556860
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Hsinyu Chao <hychao@chromium.org>
Reviewed-by: Cheng-Yi Chiang <cychiang@chromium.org>
1 file changed