[serialization] Use member initializers for Serializer.
[serialization] Use member initializers for Serializer.

No functionality change.

Swift SVN r5948

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