stdlib: temporarily disable COW support runtime checks.
stdlib: temporarily disable COW support runtime checks.

Some lldb tests are failing with that.

atrick/swift,jmgc/swift,stephentyrone/swift,benlangmuir/swift,roambotics/swift,xwu/swift,gregomni/swift,ahoppen/swift,xwu/swift,glessard/swift,parkera/swift,ahoppen/swift,gregomni/swift,roambotics/swift,hooman/swift,jckarter/swift,rudkx/swift,jckarter/swift,rudkx/swift,parkera/swift,tkremenek/swift,jckarter/swift,CodaFi/swift,hooman/swift,rudkx/swift,allevato/swift,parkera/swift,benlangmuir/swift,stephentyrone/swift,tkremenek/swift,tkremenek/swift,CodaFi/swift,gregomni/swift,atrick/swift,nathawes/swift,jckarter/swift,apple/swift,jmgc/swift,stephentyrone/swift,apple/swift,stephentyrone/swift,hooman/swift,airspeedswift/swift,glessard/swift,ahoppen/swift,stephentyrone/swift,benlangmuir/swift,apple/swift,allevato/swift,CodaFi/swift,apple/swift,tkremenek/swift,tkremenek/swift,xwu/swift,gregomni/swift,JGiola/swift,parkera/swift,glessard/swift,hooman/swift,airspeedswift/swift,JGiola/swift,tkremenek/swift,hooman/swift,nathawes/swift,glessard/swift,airspeedswift/swift,hooman/swift,xwu/swift,atrick/swift,airspeedswift/swift,glessard/swift,apple/swift,ahoppen/swift,rudkx/swift,JGiola/swift,nathawes/swift,xwu/swift,jmgc/swift,allevato/swift,atrick/swift,benlangmuir/swift,JGiola/swift,JGiola/swift,allevato/swift,atrick/swift,JGiola/swift,xwu/swift,apple/swift,xwu/swift,jckarter/swift,jmgc/swift,roambotics/swift,nathawes/swift,ahoppen/swift,jckarter/swift,stephentyrone/swift,CodaFi/swift,airspeedswift/swift,glessard/swift,allevato/swift,roambotics/swift,benlangmuir/swift,parkera/swift,parkera/swift,benlangmuir/swift,parkera/swift,nathawes/swift,gregomni/swift,CodaFi/swift,jmgc/swift,atrick/swift,roambotics/swift,jmgc/swift,airspeedswift/swift,CodaFi/swift,roambotics/swift,rudkx/swift,allevato/swift,stephentyrone/swift,tkremenek/swift,hooman/swift,jmgc/swift,parkera/swift,nathawes/swift,nathawes/swift,ahoppen/swift,jckarter/swift,CodaFi/swift,allevato/swift,gregomni/swift,rudkx/swift,airspeedswift/swift