[Clang importer] Lazily synthesize struct default initializers.
[Clang importer] Lazily synthesize struct default initializers.

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