use volatile markings in crash test

This makes it work with clang (supposedly).

BUG=chromium-os:37965
TEST=`cros_run_unit_tests --board=stumpy -p crash-reporter` passes

Change-Id: I598df1be7c8a38e14cde5f5328a3b6e2e1532ea7
Reviewed-on: https://gerrit.chromium.org/gerrit/43377
Reviewed-by: Ben Chan <benchan@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
1 file changed
tree: 4fc06f832c150e0ca8f4f862555b80067d59ad55
  1. crash_reporter/