tools: Pass grant table limits to XEN_DOMCTL_set_gnttab_limits

tools: Pass grant table limits to XEN_DOMCTL_set_gnttab_limits

XEN_DOMCTL_set_gnttab_limits is a fairly new hypercall, and is strictly
mandatory.  As it pertains to domain limits, it should be provided at
createdomain time.

In preparation to remove the hypercall, extend xen_domctl_createdomain with
the fields and arrange for all callers to pass appropriate details.  There is
no change in construction behaviour yet, but later patches will rearrange the
hypervisor internals, then delete the hypercall.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Daniel De Graaf <dgdegra@tycho.nsa.gov>
Acked-by: Christian Lindig <christian.lindig@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>