perf: Fix a typo in logserver_init script.
perf: Fix a typo in logserver_init script.

Add pass set up the log_dir to 'tmp/glog'.

BUG=None
TEST=None
R=jcgregorio@google.com

Review URL: https://codereview.chromium.org/664553005

Tiger66639/skia-buildbot,google/skia-buildbot,Tiger66639/skia-buildbot,Tiger66639/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,Tiger66639/skia-buildbot,google/skia-buildbot,Tiger66639/skia-buildbot,google/skia-buildbot,google/skia-buildbot,Tiger66639/skia-buildbot,Tiger66639/skia-buildbot,google/skia-buildbot