Copy ^/head to ^/projects/vmware_pvscsi

This is for the initial driver drop being done for the pvscsi driver from
EMC Isilon provided by VMware

This is being done to establish history for work initially posted on
Phabricator, and also to ease diffing for VMware for future versions, as
initial version is lagging the current released version a bit

See https://reviews.freebsd.org/D4112 for more details.

Discussed with: benno (EMC), Sean Evans (EMC), mp (VMware)