test: permit running executable tests on macOS on ASi
test: permit running executable tests on macOS on ASi

This allows for running the full test suite on ASi.  This is required to
enable building Swift with tests on ASi.

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