vpp-1647: fix typo in pcap_trace_command_internal
vpp-1647: fix typo in pcap_trace_command_internal

pcap rx trace on max 100 intfc tap0
then
pcap rx trace status

Displays "local0" instead of "tap0" due to a typo in
pcap_trace_command_internal(...).

Change-Id: Id2de6a24174aac24d9051b7404f01edc806a6573
Signed-off-by: Dave Barach <bfcdf3e6ca6cef45543bfbb57509c92aec9a39fb@barachs.net>

vpp-dev/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,chrisy/vpp,FDio/vpp,vpp-dev/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,vpp-dev/vpp,chrisy/vpp,vpp-dev/vpp,FDio/vpp,vpp-dev/vpp,chrisy/vpp,FDio/vpp,vpp-dev/vpp,FDio/vpp,FDio/vpp,vpp-dev/vpp