Sema: Add test case for rdar://problem/42288833
Sema: Add test case for rdar://problem/42288833

This was broken in the 4.2 branch, but has been fixed on master somehow,
so let's make sure it doesn't regress again.

amraboelela/swift,gregomni/swift,brentdax/swift,nathawes/swift,shajrawi/swift,parkera/swift,jmgc/swift,allevato/swift,ahoppen/swift,devincoughlin/swift,xwu/swift,apple/swift,nathawes/swift,jmgc/swift,shajrawi/swift,hooman/swift,sschiau/swift,lorentey/swift,practicalswift/swift,CodaFi/swift,shahmishal/swift,jmgc/swift,alblue/swift,jopamer/swift,danielmartin/swift,allevato/swift,stephentyrone/swift,sschiau/swift,karwa/swift,ahoppen/swift,jckarter/swift,austinzheng/swift,sschiau/swift,CodaFi/swift,jopamer/swift,airspeedswift/swift,JGiola/swift,parkera/swift,shahmishal/swift,practicalswift/swift,glessard/swift,atrick/swift,gribozavr/swift,practicalswift/swift,karwa/swift,jmgc/swift,practicalswift/swift,xedin/swift,lorentey/swift,parkera/swift,sschiau/swift,tkremenek/swift,airspeedswift/swift,benlangmuir/swift,karwa/swift,atrick/swift,JGiola/swift,shahmishal/swift,apple/swift,xedin/swift,apple/swift,natecook1000/swift,allevato/swift,rudkx/swift,stephentyrone/swift,roambotics/swift,karwa/swift,hooman/swift,ahoppen/swift,glessard/swift,shahmishal/swift,shajrawi/swift,natecook1000/swift,shahmishal/swift,danielmartin/swift,airspeedswift/swift,stephentyrone/swift,harlanhaskins/swift,airspeedswift/swift,brentdax/swift,austinzheng/swift,apple/swift,parkera/swift,aschwaighofer/swift,tkremenek/swift,roambotics/swift,benlangmuir/swift,karwa/swift,gribozavr/swift,glessard/swift,lorentey/swift,sschiau/swift,practicalswift/swift,gregomni/swift,allevato/swift,nathawes/swift,allevato/swift,devincoughlin/swift,benlangmuir/swift,ahoppen/swift,hooman/swift,shajrawi/swift,brentdax/swift,aschwaighofer/swift,aschwaighofer/swift,danielmartin/swift,allevato/swift,aschwaighofer/swift,airspeedswift/swift,stephentyrone/swift,allevato/swift,rudkx/swift,gribozavr/swift,parkera/swift,lorentey/swift,benlangmuir/swift,jopamer/swift,rudkx/swift,hooman/swift,alblue/swift,practicalswift/swift,xwu/swift,roambotics/swift,aschwaighofer/swift,amraboelela/swift,shahmishal/swift,xwu/swift,amraboelela/swift,JGiola/swift,gregomni/swift,xwu/swift,harlanhaskins/swift,aschwaighofer/swift,gribozavr/swift,apple/swift,devincoughlin/swift,roambotics/swift,apple/swift,ahoppen/swift,shajrawi/swift,harlanhaskins/swift,hooman/swift,stephentyrone/swift,glessard/swift,austinzheng/swift,CodaFi/swift,nathawes/swift,airspeedswift/swift,lorentey/swift,jopamer/swift,alblue/swift,glessard/swift,natecook1000/swift,parkera/swift,lorentey/swift,brentdax/swift,jmgc/swift,CodaFi/swift,benlangmuir/swift,atrick/swift,sschiau/swift,parkera/swift,practicalswift/swift,brentdax/swift,devincoughlin/swift,danielmartin/swift,roambotics/swift,natecook1000/swift,xedin/swift,rudkx/swift,tkremenek/swift,xedin/swift,austinzheng/swift,CodaFi/swift,sschiau/swift,atrick/swift,karwa/swift,natecook1000/swift,harlanhaskins/swift,jmgc/swift,aschwaighofer/swift,shajrawi/swift,lorentey/swift,shajrawi/swift,gregomni/swift,jmgc/swift,JGiola/swift,xedin/swift,rudkx/swift,roambotics/swift,amraboelela/swift,natecook1000/swift,jopamer/swift,tkremenek/swift,gribozavr/swift,atrick/swift,xwu/swift,JGiola/swift,danielmartin/swift,stephentyrone/swift,CodaFi/swift,sschiau/swift,shahmishal/swift,gribozavr/swift,airspeedswift/swift,practicalswift/swift,gribozavr/swift,devincoughlin/swift,austinzheng/swift,austinzheng/swift,nathawes/swift,jckarter/swift,amraboelela/swift,karwa/swift,JGiola/swift,jckarter/swift,gregomni/swift,tkremenek/swift,austinzheng/swift,xwu/swift,harlanhaskins/swift,jckarter/swift,benlangmuir/swift,devincoughlin/swift,nathawes/swift,jopamer/swift,xedin/swift,devincoughlin/swift,glessard/swift,xedin/swift,alblue/swift,jckarter/swift,gregomni/swift,atrick/swift,nathawes/swift,jckarter/swift,jckarter/swift,amraboelela/swift,hooman/swift,brentdax/swift,hooman/swift,rudkx/swift,harlanhaskins/swift,stephentyrone/swift,gribozavr/swift,xedin/swift,danielmartin/swift,parkera/swift,danielmartin/swift,shahmishal/swift,harlanhaskins/swift,xwu/swift,brentdax/swift,lorentey/swift,alblue/swift,CodaFi/swift,alblue/swift,amraboelela/swift,tkremenek/swift,karwa/swift,jopamer/swift,alblue/swift,ahoppen/swift,tkremenek/swift,shajrawi/swift,natecook1000/swift,devincoughlin/swift