[REPL] Use llvm::outs() instead of printf.
[REPL] Use llvm::outs() instead of printf.

And change the welcome prompt to be less friendly.

Swift SVN r31503

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