Remove reference to /data/sea/ in nightly.

The path /data/sea/... was being used in nightly for syncing performance
graphs. The actual path should have been based off of the log directory. This
didn't cause any issues before because on all performance machines that used
nightly the log dir and the path in /data/sea given were the same.

This updates the code in nightly that used /data/sea/ and updates the
syncToSourceforge graph that is responsible for rsyncing the graphs to
sourceforge