Add an assertion to make sure all stdlib files are grouped.
Add an assertion to make sure all stdlib files are grouped.

tinysun212/swift-windows,dduan/swift,xwu/swift,calebd/swift,ken0nek/swift,therealbnut/swift,devincoughlin/swift,alblue/swift,brentdax/swift,alblue/swift,tardieu/swift,felix91gr/swift,johnno1962d/swift,dduan/swift,johnno1962d/swift,harlanhaskins/swift,tardieu/swift,apple/swift,nathawes/swift,bitjammer/swift,kperryua/swift,frootloops/swift,arvedviehweger/swift,therealbnut/swift,tkremenek/swift,hughbe/swift,OscarSwanros/swift,apple/swift,johnno1962d/swift,ben-ng/swift,zisko/swift,felix91gr/swift,xwu/swift,airspeedswift/swift,russbishop/swift,djwbrown/swift,KrishMunot/swift,ken0nek/swift,jckarter/swift,jopamer/swift,kperryua/swift,milseman/swift,practicalswift/swift,manavgabhawala/swift,natecook1000/swift,milseman/swift,kperryua/swift,kperryua/swift,djwbrown/swift,SwiftAndroid/swift,karwa/swift,hooman/swift,allevato/swift,gribozavr/swift,modocache/swift,kperryua/swift,djwbrown/swift,aschwaighofer/swift,johnno1962d/swift,xwu/swift,gmilos/swift,roambotics/swift,Jnosh/swift,allevato/swift,jmgc/swift,roambotics/swift,xwu/swift,nathawes/swift,therealbnut/swift,nathawes/swift,alblue/swift,jckarter/swift,airspeedswift/swift,Jnosh/swift,JaSpa/swift,parkera/swift,calebd/swift,tardieu/swift,austinzheng/swift,manavgabhawala/swift,jopamer/swift,milseman/swift,gribozavr/swift,shajrawi/swift,kstaring/swift,gottesmm/swift,alblue/swift,Jnosh/swift,OscarSwanros/swift,jtbandes/swift,aschwaighofer/swift,bitjammer/swift,JGiola/swift,xedin/swift,KrishMunot/swift,CodaFi/swift,atrick/swift,airspeedswift/swift,SwiftAndroid/swift,JaSpa/swift,JGiola/swift,deyton/swift,bitjammer/swift,ahoppen/swift,practicalswift/swift,KrishMunot/swift,sschiau/swift,huonw/swift,stephentyrone/swift,tardieu/swift,ahoppen/swift,johnno1962d/swift,sschiau/swift,frootloops/swift,hughbe/swift,kstaring/swift,manavgabhawala/swift,apple/swift,jtbandes/swift,uasys/swift,milseman/swift,devincoughlin/swift,huonw/swift,shahmishal/swift,brentdax/swift,JaSpa/swift,tinysun212/swift-windows,huonw/swift,brentdax/swift,IngmarStein/swift,devincoughlin/swift,aschwaighofer/swift,sschiau/swift,frootloops/swift,hughbe/swift,jmgc/swift,kperryua/swift,jmgc/swift,gottesmm/swift,dduan/swift,parkera/swift,gribozavr/swift,kstaring/swift,milseman/swift,IngmarStein/swift,amraboelela/swift,tjw/swift,danielmartin/swift,uasys/swift,amraboelela/swift,glessard/swift,gregomni/swift,johnno1962d/swift,jckarter/swift,modocache/swift,dreamsxin/swift,xedin/swift,benlangmuir/swift,tinysun212/swift-windows,roambotics/swift,huonw/swift,benlangmuir/swift,brentdax/swift,IngmarStein/swift,nathawes/swift,uasys/swift,KrishMunot/swift,deyton/swift,lorentey/swift,codestergit/swift,xwu/swift,lorentey/swift,tardieu/swift,xedin/swift,amraboelela/swift,ahoppen/swift,roambotics/swift,amraboelela/swift,arvedviehweger/swift,atrick/swift,tjw/swift,ben-ng/swift,shahmishal/swift,gmilos/swift,austinzheng/swift,dreamsxin/swift,harlanhaskins/swift,tjw/swift,apple/swift,devincoughlin/swift,JaSpa/swift,benlangmuir/swift,SwiftAndroid/swift,russbishop/swift,aschwaighofer/swift,gregomni/swift,stephentyrone/swift,jtbandes/swift,calebd/swift,SwiftAndroid/swift,deyton/swift,rudkx/swift,lorentey/swift,practicalswift/swift,felix91gr/swift,CodaFi/swift,austinzheng/swift,jtbandes/swift,return/swift,jopamer/swift,russbishop/swift,shajrawi/swift,harlanhaskins/swift,return/swift,kstaring/swift,benlangmuir/swift,shahmishal/swift,harlanhaskins/swift,karwa/swift,dduan/swift,Jnosh/swift,zisko/swift,Jnosh/swift,KrishMunot/swift,brentdax/swift,sschiau/swift,gmilos/swift,xedin/swift,felix91gr/swift,stephentyrone/swift,therealbnut/swift,atrick/swift,codestergit/swift,gribozavr/swift,austinzheng/swift,danielmartin/swift,OscarSwanros/swift,frootloops/swift,gregomni/swift,austinzheng/swift,airspeedswift/swift,modocache/swift,return/swift,ken0nek/swift,tkremenek/swift,felix91gr/swift,deyton/swift,djwbrown/swift,practicalswift/swift,nathawes/swift,shahmishal/swift,ahoppen/swift,zisko/swift,tinysun212/swift-windows,xedin/swift,russbishop/swift,devincoughlin/swift,dduan/swift,aschwaighofer/swift,allevato/swift,lorentey/swift,JGiola/swift,shajrawi/swift,gmilos/swift,benlangmuir/swift,jtbandes/swift,ben-ng/swift,amraboelela/swift,amraboelela/swift,natecook1000/swift,tinysun212/swift-windows,hooman/swift,frootloops/swift,russbishop/swift,xedin/swift,practicalswift/swift,natecook1000/swift,nathawes/swift,therealbnut/swift,swiftix/swift,gmilos/swift,JGiola/swift,kstaring/swift,natecook1000/swift,allevato/swift,hughbe/swift,codestergit/swift,devincoughlin/swift,airspeedswift/swift,deyton/swift,frootloops/swift,tkremenek/swift,JGiola/swift,johnno1962d/swift,swiftix/swift,jckarter/swift,xedin/swift,xwu/swift,stephentyrone/swift,harlanhaskins/swift,jtbandes/swift,gregomni/swift,ken0nek/swift,Jnosh/swift,parkera/swift,tkremenek/swift,shajrawi/swift,parkera/swift,manavgabhawala/swift,lorentey/swift,hooman/swift,return/swift,modocache/swift,jopamer/swift,manavgabhawala/swift,glessard/swift,hughbe/swift,danielmartin/swift,IngmarStein/swift,danielmartin/swift,nat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