comms/hamlib: Update to 4.6.2

Fixed missing README.md in pkg-plist

Version 4.6.2

• Add missing levels for IC746/PRO RIG_LEVEL_RFPOWER_METER,RIG_LEVEL_RFPOWER_METER_WATTS,RIG_LEVEL_SWR,RIG_LEVEL_ALC
• Fix IC905 for gpredict
• Fix potential segfault on QMX
• Fix pmr171

Version 4.6.1

• Fix C++ builds failing on rig_list_foreach function
• Fix IC9100 rigctld startup to end up on VFOA
• Fix grig build by removing sys/socket.h -- apparently not needed
• Add new QMX entry to fix incompability with QDX
• Fix IC746/PROT to not use data byte
• FLRig to add DATA-U DATA-L modes
• Fix TS570 RIG_LEVEL_STRENGTH with cal table
• Remove get_powerstat from IC785X -- not supported
• Fix SDRConsole by removing lots of things it does not have

PR: ports/285061
Reported by: takefu@airport.fm