Review 16527

C. Thomas Tyler
Changed storage for /p4/<n>/tmp dir to the /logs volume.

The /logs volume is typically local, and is not backed up.  Both
of these characteristics are desirable for TMP/P4TMP.  We don't
want to pay the typically high latency tax of shared storage solutions
used for the /depotdata for TMP/P4TMP.  And we don't want to
needlessly backup up a folder whose name implies it's not backed

To Do:
* Make the corresponding change in the Windows SDP.
* Adjust docs as needed.

#review @russell_jackson
Tip: Use n and p to cycle through the changes.