Fix run-gtests.sh for device. am: 98103b061e

Original change: https://android-review.googlesource.com/c/platform/art/+/2458430

Change-Id: I6771ba5f3c93ec2b47ea032f840e5b1ddca34a8e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>