[IRGen] NFC: Add operator<< for MetadataResponse
[IRGen] NFC: Add operator<< for MetadataResponse

Newer versions of clang are more reliable about emitting "used"
functions, but that means that newer versions of clang can break the
build if the dependencies of a "used" function aren't satisfied.

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