[build-script-presets] Build llvm backends required to run lldb test
[build-script-presets] Build llvm backends required to run lldb test

<rdar://problem/42920398>
amraboelela/swift,benlangmuir/swift,airspeedswift/swift,nathawes/swift,xwu/swift,jopamer/swift,benlangmuir/swift,natecook1000/swift,glessard/swift,devincoughlin/swift,natecook1000/swift,aschwaighofer/swift,devincoughlin/swift,apple/swift,allevato/swift,atrick/swift,glessard/swift,gregomni/swift,hooman/swift,nathawes/swift,hooman/swift,JGiola/swift,CodaFi/swift,shahmishal/swift,alblue/swift,rudkx/swift,ahoppen/swift,xedin/swift,roambotics/swift,jopamer/swift,CodaFi/swift,lorentey/swift,shajrawi/swift,nathawes/swift,shahmishal/swift,jmgc/swift,allevato/swift,gregomni/swift,practicalswift/swift,jckarter/swift,CodaFi/swift,jmgc/swift,danielmartin/swift,hooman/swift,austinzheng/swift,gregomni/swift,austinzheng/swift,jckarter/swift,airspeedswift/swift,xwu/swift,tkremenek/swift,sschiau/swift,nathawes/swift,allevato/swift,gregomni/swift,CodaFi/swift,alblue/swift,alblue/swift,JGiola/swift,glessard/swift,amraboelela/swift,practicalswift/swift,karwa/swift,hooman/swift,devincoughlin/swift,lorentey/swift,sschiau/swift,atrick/swift,allevato/swift,airspeedswift/swift,tkremenek/swift,devincoughlin/swift,nathawes/swift,atrick/swift,amraboelela/swift,aschwaighofer/swift,jmgc/swift,ahoppen/swift,gribozavr/swift,alblue/swift,hooman/swift,stephentyrone/swift,brentdax/swift,hooman/swift,devincoughlin/swift,gribozavr/swift,parkera/swift,shajrawi/swift,xwu/swift,jckarter/swift,xedin/swift,austinzheng/swift,tkremenek/swift,CodaFi/swift,jckarter/swift,devincoughlin/swift,stephentyrone/swift,parkera/swift,austinzheng/swift,austinzheng/swift,sschiau/swift,lorentey/swift,shajrawi/swift,brentdax/swift,karwa/swift,harlanhaskins/swift,parkera/swift,shajrawi/swift,practicalswift/swift,hooman/swift,parkera/swift,roambotics/swift,jopamer/swift,jopamer/swift,alblue/swift,danielmartin/swift,aschwaighofer/swift,tkremenek/swift,brentdax/swift,aschwaighofer/swift,shajrawi/swift,glessard/swift,rudkx/swift,parkera/swift,aschwaighofer/swift,rudkx/swift,airspeedswift/swift,harlanhaskins/swift,karwa/swift,practicalswift/swift,parkera/swift,roambotics/swift,amraboelela/swift,xedin/swift,tkremenek/swift,rudkx/swift,practicalswift/swift,JGiola/swift,lorentey/swift,danielmartin/swift,roambotics/swift,natecook1000/swift,allevato/swift,harlanhaskins/swift,austinzheng/swift,tkremenek/swift,xwu/swift,amraboelela/swift,xedin/swift,parkera/swift,xedin/swift,rudkx/swift,allevato/swift,jckarter/swift,JGiola/swift,practicalswift/swift,shahmishal/swift,harlanhaskins/swift,ahoppen/swift,alblue/swift,shahmishal/swift,jopamer/swift,allevato/swift,gribozavr/swift,karwa/swift,jckarter/swift,apple/swift,amraboelela/swift,benlangmuir/swift,jmgc/swift,lorentey/swift,jopamer/swift,aschwaighofer/swift,sschiau/swift,apple/swift,danielmartin/swift,shahmishal/swift,atrick/swift,shahmishal/swift,lorentey/swift,nathawes/swift,gregomni/swift,danielmartin/swift,atrick/swift,danielmartin/swift,stephentyrone/swift,roambotics/swift,practicalswift/swift,jopamer/swift,apple/swift,natecook1000/swift,glessard/swift,sschiau/swift,gregomni/swift,xwu/swift,jmgc/swift,natecook1000/swift,xedin/swift,karwa/swift,JGiola/swift,austinzheng/swift,xedin/swift,JGiola/swift,airspeedswift/swift,jmgc/swift,ahoppen/swift,natecook1000/swift,parkera/swift,shahmishal/swift,harlanhaskins/swift,stephentyrone/swift,ahoppen/swift,airspeedswift/swift,sschiau/swift,brentdax/swift,karwa/swift,brentdax/swift,jckarter/swift,lorentey/swift,stephentyrone/swift,shajrawi/swift,gribozavr/swift,xwu/swift,sschiau/swift,gribozavr/swift,benlangmuir/swift,shahmishal/swift,sschiau/swift,gribozavr/swift,stephentyrone/swift,tkremenek/swift,CodaFi/swift,karwa/swift,practicalswift/swift,harlanhaskins/swift,benlangmuir/swift,CodaFi/swift,danielmartin/swift,airspeedswift/swift,aschwaighofer/swift,gribozavr/swift,harlanhaskins/swift,gribozavr/swift,alblue/swift,benlangmuir/swift,ahoppen/swift,rudkx/swift,apple/swift,apple/swift,glessard/swift,brentdax/swift,devincoughlin/swift,nathawes/swift,jmgc/swift,xwu/swift,shajrawi/swift,natecook1000/swift,amraboelela/swift,karwa/swift,brentdax/swift,atrick/swift,shajrawi/swift,devincoughlin/swift,stephentyrone/swift,xedin/swift,roambotics/swift,lorentey/swift