Update the rebaseline server's IP address in the redirector.

This change is now live:
http://skia-tree-status.appspot.com/redirect/rebaseline-server/static/view.html#/view.html?resultsToLoad=/results/failures

TBR=stephana
BUG=skia:2958

Review URL: https://codereview.chromium.org/657083002
logserver should create /tmp/glog if it doesn't exist.

Also move the default to serving on port 10115 which is restricted to internal IPs.

BUG=skia:

Review URL: https://codereview.chromium.org/659443004