Make the order of associated type witness inference deterministic.
Make the order of associated type witness inference deterministic.

Swift SVN r28532

tardieu/swift,therealbnut/swift,manavgabhawala/swift,ken0nek/swift,uasys/swift,tardieu/swift,lorentey/swift,parkera/swift,johnno1962d/swift,OscarSwanros/swift,ahoppen/swift,xwu/swift,uasys/swift,zisko/swift,stephentyrone/swift,jopamer/swift,tkremenek/swift,codestergit/swift,devincoughlin/swift,SwiftAndroid/swift,therealbnut/swift,atrick/swift,stephentyrone/swift,swiftix/swift.old,mightydeveloper/swift,frootloops/swift,emilstahl/swift,return/swift,xedin/swift,Jnosh/swift,harlanhaskins/swift,khizkhiz/swift,kstaring/swift,KrishMunot/swift,shahmishal/swift,arvedviehweger/swift,Ivacker/swift,slavapestov/swift,modocache/swift,frootloops/swift,benlangmuir/swift,JaSpa/swift,shahmishal/swift,JaSpa/swift,kperryua/swift,Jnosh/swift,sschiau/swift,KrishMunot/swift,gribozavr/swift,nathawes/swift,jmgc/swift,djwbrown/swift,emilstahl/swift,swiftix/swift.old,CodaFi/swift,emilstahl/swift,huonw/swift,dduan/swift,russbishop/swift,tjw/swift,xwu/swift,shajrawi/swift,swiftix/swift.old,swiftix/swift,dreamsxin/swift,CodaFi/swift,gmilos/swift,rudkx/swift,tinysun212/swift-windows,ahoppen/swift,tjw/swift,jckarter/swift,harlanhaskins/swift,adrfer/swift,nathawes/swift,dduan/swift,kstaring/swift,jopamer/swift,ben-ng/swift,LeoShimonaka/swift,swiftix/swift.old,khizkhiz/swift,alblue/swift,cbrentharris/swift,emilstahl/swift,JaSpa/swift,stephentyrone/swift,karwa/swift,shahmishal/swift,deyton/swift,natecook1000/swift,practicalswift/swift,gribozavr/swift,kstaring/swift,deyton/swift,emilstahl/swift,harlanhaskins/swift,KrishMunot/swift,kusl/swift,mightydeveloper/swift,gribozavr/swift,amraboelela/swift,SwiftAndroid/swift,hughbe/swift,SwiftAndroid/swift,xedin/swift,kusl/swift,jopamer/swift,devincoughlin/swift,huonw/swift,practicalswift/swift,gribozavr/swift,tinysun212/swift-windows,swiftix/swift.old,shajrawi/swift,nathawes/swift,mightydeveloper/swift,milseman/swift,stephentyrone/swift,benlangmuir/swift,jtbandes/swift,swiftix/swift,modocache/swift,MukeshKumarS/Swift,SwiftAndroid/swift,ben-ng/swift,kentya6/swift,austinzheng/swift,JGiola/swift,atrick/swift,ben-ng/swift,kusl/swift,OscarSwanros/swift,alblue/swift,OscarSwanros/swift,tkremenek/swift,atrick/swift,xwu/swift,shahmishal/swift,hughbe/swift,ben-ng/swift,amraboelela/swift,CodaFi/swift,parkera/swift,OscarSwanros/swift,austinzheng/swift,zisko/swift,allevato/swift,KrishMunot/swift,adrfer/swift,sdulal/swift,swiftix/swift.old,Jnosh/swift,modocache/swift,johnno1962d/swift,deyton/swift,aschwaighofer/swift,benlangmuir/swift,gmilos/swift,airspeedswift/swift,cbrentharris/swift,karwa/swift,milseman/swift,mightydeveloper/swift,lorentey/swift,xedin/swift,alblue/swift,benlangmuir/swift,gregomni/swift,MukeshKumarS/Swift,harlanhaskins/swift,zisko/swift,stephentyrone/swift,adrfer/swift,apple/swift,parkera/swift,felix91gr/swift,ahoppen/swift,brentdax/swift,return/swift,IngmarStein/swift,austinzheng/swift,kusl/swift,SwiftAndroid/swift,ben-ng/swift,tkremenek/swift,rudkx/swift,frootloops/swift,shajrawi/swift,JGiola/swift,adrfer/swift,cbrentharris/swift,kstaring/swift,gribozavr/swift,tjw/swift,alblue/swift,tardieu/swift,frootloops/swift,emilstahl/swift,atrick/swift,karwa/swift,djwbrown/swift,slavapestov/swift,mightydeveloper/swift,Ivacker/swift,JaSpa/swift,frootloops/swift,bitjammer/swift,shajrawi/swift,parkera/swift,gottesmm/swift,airspeedswift/swift,mightydeveloper/swift,JaSpa/swift,manavgabhawala/swift,MukeshKumarS/Swift,zisko/swift,IngmarStein/swift,kusl/swift,gmilos/swift,hooman/swift,felix91gr/swift,austinzheng/swift,kusl/swift,tinysun212/swift-windows,allevato/swift,sdulal/swift,modocache/swift,xedin/swift,jckarter/swift,xedin/swift,jtbandes/swift,aschwaighofer/swift,bitjammer/swift,aschwaighofer/swift,therealbnut/swift,bitjammer/swift,deyton/swift,gregomni/swift,Jnosh/swift,jmgc/swift,CodaFi/swift,Ivacker/swift,bitjammer/swift,brentdax/swift,return/swift,sdulal/swift,danielmartin/swift,harlanhaskins/swift,tinysun212/swift-windows,bitjammer/swift,russbishop/swift,codestergit/swift,gregomni/swift,parkera/swift,benlangmuir/swift,jmgc/swift,sdulal/swift,tjw/swift,natecook1000/swift,swiftix/swift,roambotics/swift,dduan/swift,lorentey/swift,amraboelela/swift,johnno1962d/swift,karwa/swift,jopamer/swift,natecook1000/swift,kentya6/swift,jtbandes/swift,calebd/swift,swiftix/swift.old,kentya6/swift,gottesmm/swift,ken0nek/swift,kperryua/swift,gregomni/swift,xwu/swift,tinysun212/swift-windows,kperryua/swift,rudkx/swift,modocache/swift,kperryua/swift,djwbrown/swift,harlanhaskins/swift,arvedviehweger/swift,apple/swift,arvedviehweger/swift,OscarSwanros/swift,nathawes/swift,zisko/swift,milseman/swift,Ivacker/swift,djwbrown/swift,CodaFi/swift,huonw/swift,hughbe/swift,devincoughlin/swift,ken0nek/swift,allevato/swift,devincoughlin/swift,xwu/swift,lorentey/swift,airspeedswift/swift,tkremenek/swift,glessard/swift,sschiau/swift,return/swift,russbishop/swift,ahoppen/swift,nathawes/swift,sschiau/swift,danielmartin/swift,MukeshKumarS/Swift,JGiola/swift,devincoughlin/swift,devincoughlin/swift,calebd/swift,LeoShimonaka/swift,austinzheng/s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