clang: change asan default output path.

BUG=chromium:314678
TEST=the asan output now goes to /var/log/asan*.log

Change-Id: I7541202b1c2266e9d510709c718b0197f2f73d34
Reviewed-on: https://chromium-review.googlesource.com/177947
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Yunlian Jiang <yunlian@chromium.org>
Tested-by: Yunlian Jiang <yunlian@chromium.org>
2 files changed