Sort some headers and change the ordering to match LLVM style. NFC.
Sort some headers and change the ordering to match LLVM style. NFC.

Swift SVN r26775

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