Use O_NOFOLLOW in bootstat_log() when opening event files.

BUG=chromium-os:16611
TEST=unit test

Change-Id: I59f06b680d1477029f749165a87d05c7700ee735
Reviewed-on: http://gerrit.chromium.org/gerrit/3689
Tested-by: Richard Barnette <jrbarnette@chromium.org>
Reviewed-by: Jim Hebert <jimhebert@chromium.org>
3 files changed