[SourceKit] Add test case for rdar://64230277
[SourceKit] Add test case for rdar://64230277

rdar://64230277 seems to already be fixed. Add a test case for it.

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