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