Ublox GPS spoofing indicator

[KimHyungSub]

Ublox GPS chip supports spoofing detection to alert the host to suspicious GPS signals.
But, ArduPilot does not deal with a warning message (UBX-NAV-STATUS-Spoofing detection state field) from the GPS module. I know that #8437 already issued Ublox GPS jamming problem. As far as I know, the GPS spoofing is more obvious than jamming indicator. Why don't you read the Ublox GPS spoofing warning and indicate the warning on GCS?

[moreba1]

this is good feature