graphics_GLBench: thermal fixes.

This change makes measuring temperatures from glbench more robust.
Also decouples -hasty from temperatures for more robustness.
Finally try to detect unexpected test termination better.

TEST=Ran on nyan_big.
BUG=chrome-os-partner:23243

Change-Id: Iec65cb9aaa42534148c3a65043368492baca1d54
Reviewed-on: https://chromium-review.googlesource.com/197605
Tested-by: Ilja Friedel <ihf@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Commit-Queue: Ilja Friedel <ihf@chromium.org>
6 files changed