Fix runtime metadata unit test even harder
Fix runtime metadata unit test even harder

StructMetadata is now two words that the parent pointer is gone.
We need to add our own storage for the generic arguments, instead
of smashing the location where the parent pointer used to be.

My previous fix was incorrect because it would set the template
size to two words (thus we no longer read past the end of the
template) but in turn we would write past the end of the
instantiated metadata.

devincoughlin/swift,shahmishal/swift,stephentyrone/swift,hooman/swift,xedin/swift,OscarSwanros/swift,jopamer/swift,parkera/swift,gribozavr/swift,apple/swift,parkera/swift,apple/swift,allevato/swift,xwu/swift,practicalswift/swift,CodaFi/swift,stephentyrone/swift,shahmishal/swift,tkremenek/swift,harlanhaskins/swift,tkremenek/swift,gregomni/swift,karwa/swift,benlangmuir/swift,natecook1000/swift,shahmishal/swift,devincoughlin/swift,aschwaighofer/swift,huonw/swift,airspeedswift/swift,nathawes/swift,roambotics/swift,austinzheng/swift,benlangmuir/swift,CodaFi/swift,jopamer/swift,jckarter/swift,huonw/swift,parkera/swift,brentdax/swift,jmgc/swift,natecook1000/swift,gregomni/swift,amraboelela/swift,airspeedswift/swift,sschiau/swift,nathawes/swift,JGiola/swift,hooman/swift,rudkx/swift,sschiau/swift,harlanhaskins/swift,swiftix/swift,CodaFi/swift,JGiola/swift,shahmishal/swift,brentdax/swift,allevato/swift,jckarter/swift,lorentey/swift,harlanhaskins/swift,airspeedswift/swift,atrick/swift,tjw/swift,natecook1000/swift,lorentey/swift,swiftix/swift,austinzheng/swift,practicalswift/swift,karwa/swift,austinzheng/swift,lorentey/swift,hooman/swift,huonw/swift,swiftix/swift,jckarter/swift,tkremenek/swift,allevato/swift,allevato/swift,roambotics/swift,xedin/swift,jmgc/swift,stephentyrone/swift,shajrawi/swift,sschiau/swift,gribozavr/swift,CodaFi/swift,practicalswift/swift,tjw/swift,devincoughlin/swift,frootloops/swift,apple/swift,aschwaighofer/swift,devincoughlin/swift,swiftix/swift,nathawes/swift,brentdax/swift,zisko/swift,harlanhaskins/swift,jopamer/swift,alblue/swift,nathawes/swift,zisko/swift,apple/swift,shahmishal/swift,swiftix/swift,aschwaighofer/swift,stephentyrone/swift,frootloops/swift,jopamer/swift,OscarSwanros/swift,xedin/swift,CodaFi/swift,OscarSwanros/swift,aschwaighofer/swift,frootloops/swift,danielmartin/swift,alblue/swift,atrick/swift,sschiau/swift,tkremenek/swift,gribozavr/swift,devincoughlin/swift,danielmartin/swift,shajrawi/swift,shajrawi/swift,danielmartin/swift,frootloops/swift,jmgc/swift,roambotics/swift,xedin/swift,jmgc/swift,zisko/swift,amraboelela/swift,tjw/swift,parkera/swift,zisko/swift,amraboelela/swift,tkremenek/swift,brentdax/swift,amraboelela/swift,JGiola/swift,aschwaighofer/swift,lorentey/swift,xwu/swift,allevato/swift,glessard/swift,devincoughlin/swift,frootloops/swift,ahoppen/swift,lorentey/swift,aschwaighofer/swift,alblue/swift,shajrawi/swift,airspeedswift/swift,stephentyrone/swift,JGiola/swift,karwa/swift,swiftix/swift,shajrawi/swift,alblue/swift,gribozavr/swift,CodaFi/swift,sschiau/swift,huonw/swift,shajrawi/swift,ahoppen/swift,shahmishal/swift,devincoughlin/swift,amraboelela/swift,ahoppen/swift,aschwaighofer/swift,xedin/swift,parkera/swift,airspeedswift/swift,glessard/swift,karwa/swift,austinzheng/swift,OscarSwanros/swift,jmgc/swift,huonw/swift,amraboelela/swift,glessard/swift,atrick/swift,allevato/swift,shajrawi/swift,atrick/swift,brentdax/swift,gribozavr/swift,karwa/swift,tjw/swift,lorentey/swift,jckarter/swift,rudkx/swift,gregomni/swift,zisko/swift,hooman/swift,jckarter/swift,gregomni/swift,karwa/swift,parkera/swift,xwu/swift,xwu/swift,practicalswift/swift,xwu/swift,danielmartin/swift,lorentey/swift,devincoughlin/swift,jckarter/swift,OscarSwanros/swift,gribozavr/swift,hooman/swift,harlanhaskins/swift,benlangmuir/swift,nathawes/swift,harlanhaskins/swift,alblue/swift,rudkx/swift,jmgc/swift,ahoppen/swift,tjw/swift,atrick/swift,jckarter/swift,natecook1000/swift,jopamer/swift,huonw/swift,karwa/swift,tkremenek/swift,austinzheng/swift,practicalswift/swift,karwa/swift,harlanhaskins/swift,xwu/swift,stephentyrone/swift,frootloops/swift,zisko/swift,ahoppen/swift,airspeedswift/swift,CodaFi/swift,OscarSwanros/swift,glessard/swift,allevato/swift,practicalswift/swift,glessard/swift,danielmartin/swift,nathawes/swift,gregomni/swift,austinzheng/swift,rudkx/swift,alblue/swift,xwu/swift,gregomni/swift,benlangmuir/swift,stephentyrone/swift,brentdax/swift,huonw/swift,frootloops/swift,tjw/swift,nathawes/swift,JGiola/swift,gribozavr/swift,hooman/swift,sschiau/swift,shajrawi/swift,swiftix/swift,atrick/swift,xedin/swift,amraboelela/swift,airspeedswift/swift,benlangmuir/swift,natecook1000/swift,OscarSwanros/swift,benlangmuir/swift,sschiau/swift,roambotics/swift,danielmartin/swift,rudkx/swift,natecook1000/swift,apple/swift,roambotics/swift,roambotics/swift,gribozavr/swift,jopamer/swift,parkera/swift,tjw/swift,xedin/swift,alblue/swift,practicalswift/swift,JGiola/swift,tkremenek/swift,hooman/swift,danielmartin/swift,jmgc/swift,zisko/swift,sschiau/swift,lorentey/swift,ahoppen/swift,apple/swift,austinzheng/swift,rudkx/swift,shahmishal/swift,glessard/swift,practicalswift/swift,shahmishal/swift,natecook1000/swift,parkera/swift,xedin/swift,jopamer/swift,brentdax/swift