swift-api-digester: use elaborated typename
swift-api-digester: use elaborated typename

cl is unable to disambiguate between `swift::KnownProtocolKind` and
`swift::ide::api::KnownProtocolKind`.  Use the elaborated typename to
disambiguate the type.  This allows us to build `swift-api-digester`
with cl again.

nathawes/swift,atrick/swift,harlanhaskins/swift,sschiau/swift,lorentey/swift,shahmishal/swift,allevato/swift,nathawes/swift,gribozavr/swift,karwa/swift,shahmishal/swift,jmgc/swift,hooman/swift,devincoughlin/swift,roambotics/swift,aschwaighofer/swift,jckarter/swift,benlangmuir/swift,apple/swift,gribozavr/swift,roambotics/swift,allevato/swift,shajrawi/swift,hooman/swift,ahoppen/swift,lorentey/swift,hooman/swift,xedin/swift,benlangmuir/swift,shajrawi/swift,karwa/swift,atrick/swift,ahoppen/swift,gribozavr/swift,atrick/swift,parkera/swift,devincoughlin/swift,allevato/swift,xedin/swift,shajrawi/swift,gribozavr/swift,stephentyrone/swift,sschiau/swift,jckarter/swift,atrick/swift,benlangmuir/swift,jckarter/swift,nathawes/swift,xedin/swift,CodaFi/swift,stephentyrone/swift,jmgc/swift,tkremenek/swift,shahmishal/swift,sschiau/swift,glessard/swift,rudkx/swift,gregomni/swift,rudkx/swift,gribozavr/swift,parkera/swift,devincoughlin/swift,JGiola/swift,lorentey/swift,ahoppen/swift,benlangmuir/swift,jckarter/swift,hooman/swift,rudkx/swift,devincoughlin/swift,allevato/swift,jmgc/swift,apple/swift,shahmishal/swift,CodaFi/swift,parkera/swift,gregomni/swift,xwu/swift,xedin/swift,nathawes/swift,xwu/swift,airspeedswift/swift,tkremenek/swift,xwu/swift,sschiau/swift,lorentey/swift,parkera/swift,xedin/swift,apple/swift,devincoughlin/swift,roambotics/swift,CodaFi/swift,rudkx/swift,jckarter/swift,xwu/swift,stephentyrone/swift,devincoughlin/swift,JGiola/swift,roambotics/swift,JGiola/swift,ahoppen/swift,gregomni/swift,apple/swift,CodaFi/swift,JGiola/swift,shajrawi/swift,CodaFi/swift,ahoppen/swift,atrick/swift,aschwaighofer/swift,benlangmuir/swift,glessard/swift,tkremenek/swift,parkera/swift,tkremenek/swift,harlanhaskins/swift,lorentey/swift,glessard/swift,xwu/swift,allevato/swift,stephentyrone/swift,shahmishal/swift,jckarter/swift,parkera/swift,ahoppen/swift,aschwaighofer/swift,harlanhaskins/swift,JGiola/swift,harlanhaskins/swift,nathawes/swift,tkremenek/swift,xedin/swift,xwu/swift,jckarter/swift,parkera/swift,hooman/swift,allevato/swift,aschwaighofer/swift,shajrawi/swift,rudkx/swift,glessard/swift,nathawes/swift,rudkx/swift,jmgc/swift,xwu/swift,devincoughlin/swift,glessard/swift,CodaFi/swift,gribozavr/swift,airspeedswift/swift,gregomni/swift,stephentyrone/swift,roambotics/swift,stephentyrone/swift,nathawes/swift,hooman/swift,harlanhaskins/swift,devincoughlin/swift,aschwaighofer/swift,aschwaighofer/swift,apple/swift,airspeedswift/swift,karwa/swift,CodaFi/swift,airspeedswift/swift,gribozavr/swift,karwa/swift,sschiau/swift,sschiau/swift,shajrawi/swift,xedin/swift,stephentyrone/swift,apple/swift,sschiau/swift,harlanhaskins/swift,karwa/swift,shahmishal/swift,atrick/swift,gregomni/swift,hooman/swift,jmgc/swift,karwa/swift,shahmishal/swift,gribozavr/swift,glessard/swift,airspeedswift/swift,harlanhaskins/swift,jmgc/swift,lorentey/swift,lorentey/swift,parkera/swift,jmgc/swift,tkremenek/swift,lorentey/swift,airspeedswift/swift,gregomni/swift,shahmishal/swift,karwa/swift,aschwaighofer/swift,shajrawi/swift,benlangmuir/swift,roambotics/swift,karwa/swift,tkremenek/swift,shajrawi/swift,sschiau/swift,allevato/swift,airspeedswift/swift,JGiola/swift,xedin/swift