Add new `glinswup-PLSx3_1.0.5.bb` binary recipe to package the
Cinterion PLSx3 firmware update tool.
Include `pls3_fw_update.sh` helper script to:
- validate input firmware file and modem port
- stop modem-related services before update
- run `glinswup_PLSx3` firmware update
- restore services on exit
https://onedigi.atlassian.net/browse/DEL-9989
Signed-off-by: Francisco Gil <francisco.gilmartinez@digi.com>
Francisco Gil