Update dexdrip.c
Update dexdrip.c

add option to allow alternate protocol suitable for dexterity android app and similar when plugged in to usb
novagannas/wixel-xDrip,Cagier/wixel-xDrip,raduiliescu/wixel-DexDrip,sm6xmm/wixel-xDrip,sm6xmm/wixel-xDrip,jamorham/wixel-xDrip,jamorham/wixel-xDrip,StephenBlackWasAlreadyTaken/wixel-xDrip,jamorham/wixel-xDrip,novagannas/wixel-xDrip,StephenBlackWasAlreadyTaken/wixel-xDrip,raduiliescu/wixel-DexDrip,Cagier/wixel-xDrip,jamorham/wixel-xDrip,sm6xmm/wixel-xDrip,Cagier/wixel-xDrip,StephenBlackWasAlreadyTaken/wixel-xDrip,raduiliescu/wixel-DexDrip,sm6xmm/wixel-xDrip,novagannas/wixel-xDrip