devil: When setting flags on the device, log the file location.
devil: When setting flags on the device, log the file location.

R=jbudorick

Bug: chromium:907899
Change-Id: Idbad6761a3f9490039a7fbbb0adb410cb0585b55
Reviewed-on: https://chromium-review.googlesource.com/c/1352373
Auto-Submit: Ben Pastene <e214258550f76fa23ac7c1d953424f3f468f5c6b@chromium.org>
Commit-Queue: John Budorick <17d38a2d68c6a07a3ab0ce4a2873c5acefbd3dbb@chromium.org>
Reviewed-by: John Budorick <17d38a2d68c6a07a3ab0ce4a2873c5acefbd3dbb@chromium.org>

catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult