Update default value for unknown diagnostic IDs
Update default value for unknown diagnostic IDs

hooman/swift,apple/swift,JGiola/swift,parkera/swift,parkera/swift,JGiola/swift,benlangmuir/swift,ahoppen/swift,xwu/swift,xwu/swift,glessard/swift,tkremenek/swift,rudkx/swift,gregomni/swift,atrick/swift,gregomni/swift,tkremenek/swift,rudkx/swift,apple/swift,parkera/swift,parkera/swift,ahoppen/swift,hooman/swift,benlangmuir/swift,gregomni/swift,ahoppen/swift,ahoppen/swift,tkremenek/swift,roambotics/swift,parkera/swift,apple/swift,atrick/swift,tkremenek/swift,apple/swift,parkera/swift,gregomni/swift,glessard/swift,xwu/swift,roambotics/swift,JGiola/swift,atrick/swift,tkremenek/swift,hooman/swift,benlangmuir/swift,ahoppen/swift,apple/swift,glessard/swift,roambotics/swift,rudkx/swift,xwu/swift,rudkx/swift,atrick/swift,benlangmuir/swift,glessard/swift,rudkx/swift,JGiola/swift,parkera/swift,apple/swift,hooman/swift,roambotics/swift,gregomni/swift,hooman/swift,roambotics/swift,atrick/swift,JGiola/swift,parkera/swift,gregomni/swift,xwu/swift,xwu/swift,xwu/swift,hooman/swift,benlangmuir/swift,roambotics/swift,atrick/swift,tkremenek/swift,tkremenek/swift,hooman/swift,rudkx/swift,glessard/swift,JGiola/swift,benlangmuir/swift,ahoppen/swift,glessard/swift