misc: fix a trunccation on vhost dump
misc: fix a trunccation on vhost dump

feature is u64. We need to print it with %llx and enough precision to
avoid truncation

Type: fix

Signed-off-by: Steven Luong <a748ea44ad7b179c2313a856d44e1e4eb39869bb@cisco.com>
Change-Id: I9f5dd523400473b4881b01b8e6cecf439a8060d9

FDio/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,FDio/vpp,chrisy/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp