[RFT] dumpcap: add file-prefix option

[Kaur, Arshdeep]

> -----Original Message-----
> From: Stephen Hemminger <stephen at networkplumber.org>
> Sent: Tuesday, September 13, 2022 12:34 AM
> To: dev at dpdk.org
> Cc: Stephen Hemminger <stephen at networkplumber.org>; Kaur, Arshdeep
> <arshdeep.kaur at intel.com>
> Subject: [RFT] dumpcap: add file-prefix option
> 
> When using dumpcap in container environment or with multiple DPDK
> processes, it is useful to be able to specify file prefix.
> 
> This version only accepts the long format option used by other commands.
> If no prefix is specified then the default is used.
> 
> Suggested-by: Arshdeep Kaur <arshdeep.kaur at intel.com>
> Signed-off-by: Stephen Hemminger <stephen at networkplumber.org>

Looks good ready to merge.

Acked-by:  Arshdeep Kaur <arshdeep.kaur at intel.com>

Tested-by: Arshdeep Kaur <arshdeep.kaur at intel.com>