net/tcpslice: Update to solve "problems finding end packet of file" error

tcpslice was a 2014 version that required an internal header file
(pcap-int.h) to fully support systems with 64-bit longs. After I
filed an issue with upstream the code was rewritten to eliminate
this dependency; update to this version.

PR: 243522
Approved by: sbz (maintainer timeout, 9 weeks)