[test] Use the SDK provided in the CMake configuration.
[test] Use the SDK provided in the CMake configuration.

...rather than just asking xcrun to give us one. This is the one we
built for; we ought to be using it!

jckarter/swift,CodaFi/swift,amraboelela/swift,tjw/swift,gottesmm/swift,manavgabhawala/swift,practicalswift/swift,tjw/swift,aschwaighofer/swift,jmgc/swift,apple/swift,parkera/swift,Jnosh/swift,johnno1962d/swift,stephentyrone/swift,airspeedswift/swift,gottesmm/swift,bitjammer/swift,sschiau/swift,therealbnut/swift,apple/swift,tkremenek/swift,codestergit/swift,dduan/swift,bitjammer/swift,adrfer/swift,jopamer/swift,jmgc/swift,jmgc/swift,jopamer/swift,airspeedswift/swift,KrishMunot/swift,adrfer/swift,alblue/swift,jckarter/swift,jtbandes/swift,return/swift,gribozavr/swift,modocache/swift,hughbe/swift,gribozavr/swift,karwa/swift,uasys/swift,SwiftAndroid/swift,OscarSwanros/swift,swiftix/swift,uasys/swift,codestergit/swift,hughbe/swift,SwiftAndroid/swift,amraboelela/swift,huonw/swift,kperryua/swift,tardieu/swift,frootloops/swift,airspeedswift/swift,gregomni/swift,deyton/swift,kstaring/swift,amraboelela/swift,natecook1000/swift,calebd/swift,SwiftAndroid/swift,IngmarStein/swift,gmilos/swift,Jnosh/swift,tinysun212/swift-windows,xedin/swift,ben-ng/swift,jckarter/swift,kstaring/swift,gmilos/swift,huonw/swift,Jnosh/swift,JGiola/swift,glessard/swift,jmgc/swift,natecook1000/swift,adrfer/swift,gribozavr/swift,russbishop/swift,danielmartin/swift,dduan/swift,KrishMunot/swift,hooman/swift,slavapestov/swift,therealbnut/swift,manavgabhawala/swift,johnno1962d/swift,roambotics/swift,ben-ng/swift,manavgabhawala/swift,shajrawi/swift,benlangmuir/swift,calebd/swift,KrishMunot/swift,apple/swift,natecook1000/swift,ken0nek/swift,austinzheng/swift,parkera/swift,devincoughlin/swift,karwa/swift,gribozavr/swift,JaSpa/swift,frootloops/swift,slavapestov/swift,Jnosh/swift,parkera/swift,shajrawi/swift,modocache/swift,xwu/swift,devincoughlin/swift,return/swift,shahmishal/swift,adrfer/swift,deyton/swift,SwiftAndroid/swift,codestergit/swift,sschiau/swift,allevato/swift,OscarSwanros/swift,adrfer/swift,sschiau/swift,KrishMunot/swift,harlanhaskins/swift,stephentyrone/swift,johnno1962d/swift,nathawes/swift,milseman/swift,shajrawi/swift,nathawes/swift,russbishop/swift,karwa/swift,austinzheng/swift,zisko/swift,shahmishal/swift,ben-ng/swift,swiftix/swift,uasys/swift,stephentyrone/swift,brentdax/swift,devincoughlin/swift,atrick/swift,tkremenek/swift,uasys/swift,parkera/swift,practicalswift/swift,deyton/swift,xedin/swift,gmilos/swift,ken0nek/swift,airspeedswift/swift,nathawes/swift,devincoughlin/swift,CodaFi/swift,ahoppen/swift,sschiau/swift,apple/swift,xwu/swift,harlanhaskins/swift,amraboelela/swift,IngmarStein/swift,shahmishal/swift,felix91gr/swift,xedin/swift,johnno1962d/swift,milseman/swift,tardieu/swift,swiftix/swift,tkremenek/swift,austinzheng/swift,nathawes/swift,karwa/swift,bitjammer/swift,allevato/swift,rudkx/swift,devincoughlin/swift,xwu/swift,kstaring/swift,roambotics/swift,JaSpa/swift,brentdax/swift,shahmishal/swift,calebd/swift,hughbe/swift,zisko/swift,arvedviehweger/swift,IngmarStein/swift,allevato/swift,modocache/swift,kperryua/swift,devincoughlin/swift,tardieu/swift,sschiau/swift,tkremenek/swift,allevato/swift,russbishop/swift,KrishMunot/swift,codestergit/swift,gottesmm/swift,swiftix/swift,benlangmuir/swift,ben-ng/swift,hughbe/swift,KrishMunot/swift,return/swift,gottesmm/swift,milseman/swift,atrick/swift,therealbnut/swift,shajrawi/swift,lorentey/swift,ken0nek/swift,modocache/swift,danielmartin/swift,allevato/swift,tardieu/swift,calebd/swift,frootloops/swift,IngmarStein/swift,SwiftAndroid/swift,slavapestov/swift,brentdax/swift,shahmishal/swift,xedin/swift,frootloops/swift,Jnosh/swift,adrfer/swift,JaSpa/swift,shajrawi/swift,atrick/swift,xedin/swift,devincoughlin/swift,djwbrown/swift,zisko/swift,manavgabhawala/swift,natecook1000/swift,alblue/swift,karwa/swift,jmgc/swift,kperryua/swift,tardieu/swift,airspeedswift/swift,danielmartin/swift,brentdax/swift,JGiola/swift,bitjammer/swift,practicalswift/swift,return/swift,natecook1000/swift,arvedviehweger/swift,aschwaighofer/swift,gmilos/swift,practicalswift/swift,aschwaighofer/swift,djwbrown/swift,therealbnut/swift,huonw/swift,aschwaighofer/swift,therealbnut/swift,karwa/swift,devincoughlin/swift,tinysun212/swift-windows,airspeedswift/swift,therealbnut/swift,JaSpa/swift,practicalswift/swift,danielmartin/swift,stephentyrone/swift,arvedviehweger/swift,parkera/swift,modocache/swift,brentdax/swift,jtbandes/swift,calebd/swift,ken0nek/swift,ahoppen/swift,huonw/swift,stephentyrone/swift,harlanhaskins/swift,zisko/swift,johnno1962d/swift,manavgabhawala/swift,gottesmm/swift,jopamer/swift,huonw/swift,return/swift,kperryua/swift,hooman/swift,kstaring/swift,russbishop/swift,therealbnut/swift,tinysun212/swift-windows,shahmishal/swift,jtbandes/swift,tjw/swift,harlanhaskins/swift,jtbandes/swift,hooman/swift,jtbandes/swift,gmilos/swift,CodaFi/swift,jckarter/swift,apple/swift,xedin/swift,roambotics/swift,sschiau/swift,gottesmm/swift,danielmartin/swift,dduan/swift,tkremenek/swift,milseman/swift,alblue/swift,hughbe/swift,lorentey/swift,gregomni/swift,frootloops/swift,djwbrown/swift,jopamer/swift,danielmartin/swift,arvedviehweger/swift,zisko/swift,gribozavr/swift,lorentey/swift,russbishop/swift,Jnosh/swift,tjw/swift,arvedviehweger/swift,slavapestov/swift,natecook1000/swift,austinzheng/swift,SwiftAndroid/swift,zisko/swift,codestergit/swift,rudkx/swift,lorentey/swift,bitjammer/swift,deyton/swift,ken0nek/swift,tjw/swift,CodaFi/swift,parkera/swift,uasys/swift,benlangmuir/swift,ben-ng/swift,uasys/swift,austinzheng/swift,return/swift,IngmarStein/swift,harlanhaskins/swift,KrishMunot/swift,frootloops/swift,CodaFi/swift,ken0nek/swift,manavgabhawala/swift,CodaFi/swift,milseman/swift,xwu/swift,rudkx/swift,nathawes/swift,OscarSwanros/swift,JGiola/swift,djwbrown/swift,gottesmm/swift,aschwaighofer/swift,huonw/swift,stephentyrone/swift,jckarter/swift,harlanhaskins/swift,felix91gr/swift,milseman/swift,OscarSwanros/swift,OscarSwanros/swift,xedin/swift,JGiola/swift,kperryua/swift,ahoppen/swift,gmilos/swift,djwbrown/swift,hooman/swift,zisko/swift,jmgc/swift,gribozavr/swift,jmgc/swift,slavapestov/swift,tinysun212/swift-windows,JaSpa/swift,hughbe/swift,shajrawi/swift,gribozavr/swift,roambotics/swift,felix91gr/swift,brentdax/swift,rudkx/swift,gregomni/swift,jckarter/swift,harlanhaskins/swift,alblue/swift,dreamsxin/swift,gmilos/swift,ben-ng/swift,kperryua/swift,xwu/swift,alblue/swift,russbishop/swift,swiftix/swift,lorentey/swift,apple/swift,gribozavr/swift,hooman/swift,karwa/swift,nathawes/swift,gregomni/swift,JaSpa/swift,shahmishal/swift,atrick/swift,felix91gr/swift,tjw/swift,glessard/swift,ken0nek/swift,swiftix/swift,amraboelela/swift,benlangmuir/swift,practicalswift/swift,codestergit/swift,dduan/swift,kstaring/swift,tkremenek/swift,OscarSwanros/swift,shajrawi/swift,swiftix/swift,karwa/swift,milseman/swift,practicalswift/swift,allevato/swift,codestergit/swift,bitjammer/swift,deyton/swift,johnno1962d/swift,alblue/swift,arvedviehweger/swift,OscarSwanros/swift,alblue/swift,felix91gr/swift,SwiftAndroid/swift,felix91gr/swift,arvedviehweger/swift,adrfer/swift,parkera/swift,huonw/swift,xwu/swift,jopamer/swift,xwu/swift,glessard/swift,ben-ng/swift,johnno1962d/swift,JGiola/swift,xedin/swift,tardieu/swift,Jnosh/swift,tkremenek/swift,slavapestov/swift,tardieu/swift,JaSpa/swift,kstaring/swift,jopamer/swift,deyton/swift,shajrawi/swift,jckarter/swift,return/swift,glessard/swift,glessard/swift,dreamsxin/swift,natecook1000/swift,rudkx/swift,ahoppen/swift,jtbandes/swift,djwbrown/swift,russbishop/swift,dduan/swift,shahmishal/swift,stephentyrone/swift,gregomni/swift,hooman/swift,atrick/swift,IngmarStein/swift,dduan/swift,tinysun212/swift-windows,austinzheng/swift,tinysun212/swift-windows,sschiau/swift,manavgabhawala/swift,calebd/swift,IngmarStein/swift,gregomni/swift,lorentey/swift,parkera/swift,kstaring/swift,benlangmuir/swift,hughbe/swift,slavapestov/swift,calebd/swift,allevato/swift,djwbrown/swift,practicalswift/swift,danielmartin/swift,dduan/swift,aschwaighofer/swift,deyton/swift,uasys/swift,bitjammer/swift,tinysun212/swift-windows,modocache/swift,roambotics/swift,brentdax/swift,JGiola/swift,amraboelela/swift,jtbandes/swift,atrick/swift,austinzheng/swift,benlangmuir/swift,kperryua/swift,aschwaighofer/swift,airspeedswift/swift,modocache/swift,ahoppen/swift,lorentey/swift,roambotics/swift,lorentey/swift,sschiau/swift,glessard/swift,rudkx/swift,felix91gr/swift,ahoppen/swift,CodaFi/swift,hooman/swift,tjw/swift,jopamer/swift,nathawes/swift,frootloops/swift,amraboelela/swift