Mount /tmp as executable during image_to_live.

Due to a security bug (which I can't actually see) /tmp was recently
marked as non-exec. Fix that (otherwise image_to_live can't update
the stateful partition).

BUG=chromium:312377
TEST=Ran it.

Change-Id: Iace3c668ac4667b5606cdaba741c442d79e77044
Reviewed-on: https://chromium-review.googlesource.com/174900
Tested-by: Chris Sosa <sosa@chromium.org>
Reviewed-by: David James <davidjames@chromium.org>
Commit-Queue: Chris Sosa <sosa@chromium.org>
1 file changed