toolbox: add hgfs freebsd stub
toolbox: add hgfs freebsd stub

The toolbox/process package uses a few hgfs package constants.
Need stub this to compile when GOOS=freebsd

vmware/govmomi,bruceadowns/govmomi,vmware/govmomi,bruceadowns/govmomi,bruceadowns/govmomi,vmware/govmomi