[test] Update ClangImporter/enum-anon.swift for Clang improvements (#20804)
[test] Update ClangImporter/enum-anon.swift for Clang improvements (#20804)

We previously weren't able to import something properly, but now it's
working because of some change in Clang. Let's take it!

rdar://problem/46263312
lorentey/swift,harlanhaskins/swift,stephentyrone/swift,apple/swift,allevato/swift,benlangmuir/swift,karwa/swift,CodaFi/swift,aschwaighofer/swift,gregomni/swift,devincoughlin/swift,roambotics/swift,sschiau/swift,airspeedswift/swift,gregomni/swift,gregomni/swift,atrick/swift,xwu/swift,nathawes/swift,tkremenek/swift,xwu/swift,airspeedswift/swift,parkera/swift,glessard/swift,stephentyrone/swift,atrick/swift,gregomni/swift,ahoppen/swift,allevato/swift,xwu/swift,sschiau/swift,roambotics/swift,sschiau/swift,gribozavr/swift,allevato/swift,allevato/swift,ahoppen/swift,sschiau/swift,benlangmuir/swift,rudkx/swift,lorentey/swift,jmgc/swift,harlanhaskins/swift,jmgc/swift,benlangmuir/swift,devincoughlin/swift,lorentey/swift,karwa/swift,allevato/swift,glessard/swift,rudkx/swift,JGiola/swift,hooman/swift,roambotics/swift,rudkx/swift,jmgc/swift,glessard/swift,parkera/swift,gribozavr/swift,roambotics/swift,CodaFi/swift,xwu/swift,atrick/swift,CodaFi/swift,gregomni/swift,parkera/swift,stephentyrone/swift,lorentey/swift,benlangmuir/swift,CodaFi/swift,tkremenek/swift,allevato/swift,glessard/swift,allevato/swift,JGiola/swift,parkera/swift,atrick/swift,apple/swift,roambotics/swift,nathawes/swift,parkera/swift,harlanhaskins/swift,JGiola/swift,parkera/swift,jmgc/swift,devincoughlin/swift,jckarter/swift,airspeedswift/swift,xwu/swift,karwa/swift,nathawes/swift,rudkx/swift,jckarter/swift,JGiola/swift,sschiau/swift,jckarter/swift,hooman/swift,airspeedswift/swift,ahoppen/swift,devincoughlin/swift,xwu/swift,gribozavr/swift,benlangmuir/swift,apple/swift,apple/swift,stephentyrone/swift,rudkx/swift,jckarter/swift,devincoughlin/swift,karwa/swift,rudkx/swift,sschiau/swift,hooman/swift,glessard/swift,gribozavr/swift,parkera/swift,aschwaighofer/swift,hooman/swift,airspeedswift/swift,aschwaighofer/swift,aschwaighofer/swift,karwa/swift,aschwaighofer/swift,karwa/swift,ahoppen/swift,tkremenek/swift,stephentyrone/swift,stephentyrone/swift,CodaFi/swift,stephentyrone/swift,lorentey/swift,atrick/swift,hooman/swift,roambotics/swift,airspeedswift/swift,devincoughlin/swift,atrick/swift,gregomni/swift,gribozavr/swift,parkera/swift,xwu/swift,harlanhaskins/swift,harlanhaskins/swift,gribozavr/swift,jmgc/swift,jckarter/swift,sschiau/swift,jmgc/swift,CodaFi/swift,karwa/swift,jckarter/swift,tkremenek/swift,jckarter/swift,karwa/swift,tkremenek/swift,harlanhaskins/swift,nathawes/swift,nathawes/swift,lorentey/swift,sschiau/swift,aschwaighofer/swift,ahoppen/swift,tkremenek/swift,devincoughlin/swift,harlanhaskins/swift,airspeedswift/swift,devincoughlin/swift,lorentey/swift,lorentey/swift,hooman/swift,jmgc/swift,benlangmuir/swift,nathawes/swift,aschwaighofer/swift,glessard/swift,nathawes/swift,JGiola/swift,ahoppen/swift,hooman/swift,CodaFi/swift,JGiola/swift,gribozavr/swift,tkremenek/swift,apple/swift,apple/swift,gribozavr/swift