Redirect ASAN output to the /var/log/chrome/asan_log.
Redirect ASAN output to the /var/log/chrome/asan_log.

This is because Chrome stderr is /dev/null now (crbug.com/156308).

BUG=chromium-os:26249
TEST=manual

Change-Id: Iebdc972119efa799ae2d60cce7b7947a3e6f5a04
Reviewed-on: https://gerrit.chromium.org/gerrit/38024
Tested-by: Denis Glotov <c5d60b421139c547d47a20efdb78ca289092089b@chromium.org>
Reviewed-by: Gaurav Shah <2987db6a10bcfe664554a372d01e80df7fd325a3@chromium.org>
Commit-Ready: Denis Glotov <c5d60b421139c547d47a20efdb78ca289092089b@chromium.org>

chadversary/chromiumos.platform.login_manager,chadversary/chromiumos.platform.login_manager,chadversary/chromiumos.platform.login_manager