[ConstraintSystem] Test @autoclosure behavior in Swift < 5 compatibility mode
[ConstraintSystem] Test @autoclosure behavior in Swift < 5 compatibility mode

Swift versions < 5 allowed argument passed to @autoclosure parameter
to be @autoclosure function type, we need to make sure that such
behavior is preserved.

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