Fixed gpg invocation with the proper parameters.
Fixed gpg invocation with the proper parameters.

racing-tech/rrp-raspi-installer,beylsp/rpi-installer,matt2005/raspbian-ua-netinst,beylsp/rpi-installer,cybercircuits/raspbian-ua-netinst,malsony/raspbian-ua-netinst,FooDeas/raspberrypi-ua-netinst,kolargol/raspbian-ua-netinst,daytonpid/FireHawk,dicer/raspbian-ua-netinst,yodaaut/raspbian-ua-netinst,racing-tech/rrp-raspi-installer,firepick/FireHawk