RequirementMachine: Fix compile error on Linux
RequirementMachine: Fix compile error on Linux

glessard/swift,gregomni/swift,roambotics/swift,apple/swift,ahoppen/swift,tkremenek/swift,benlangmuir/swift,rudkx/swift,rudkx/swift,roambotics/swift,xwu/swift,parkera/swift,benlangmuir/swift,JGiola/swift,glessard/swift,tkremenek/swift,benlangmuir/swift,ahoppen/swift,apple/swift,atrick/swift,rudkx/swift,rudkx/swift,atrick/swift,parkera/swift,gregomni/swift,JGiola/swift,atrick/swift,parkera/swift,rudkx/swift,parkera/swift,tkremenek/swift,parkera/swift,atrick/swift,gregomni/swift,apple/swift,glessard/swift,roambotics/swift,benlangmuir/swift,xwu/swift,benlangmuir/swift,roambotics/swift,parkera/swift,JGiola/swift,apple/swift,xwu/swift,glessard/swift,parkera/swift,xwu/swift,rudkx/swift,tkremenek/swift,JGiola/swift,apple/swift,atrick/swift,tkremenek/swift,ahoppen/swift,glessard/swift,ahoppen/swift,xwu/swift,apple/swift,JGiola/swift,gregomni/swift,gregomni/swift,tkremenek/swift,atrick/swift,hooman/swift,benlangmuir/swift,JGiola/swift,hooman/swift,gregomni/swift,tkremenek/swift,hooman/swift,hooman/swift,ahoppen/swift,hooman/swift,hooman/swift,roambotics/swift,roambotics/swift,xwu/swift,parkera/swift,hooman/swift,glessard/swift,ahoppen/swift,xwu/swift