[polymorphic-builtins] Enable test during optimize builds.
[polymorphic-builtins] Enable test during optimize builds.

The confusion here was around a test that was testing the behavior when one
/does not/ guard a polymorphic builtin with a _isConcrete. Specifically, without
_isConcrete, one gets weird behavior where in debug we crash, but in release we
may not due to further inlining/specialization. With _isConcrete, we never
crashand get the appropriate behavior.

This commit works by changing the current run of the polymorphic builtin test to
force -Onone and adds an extra -O run that way we validate both behaviors.

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