Introduce some make hackery to make the low-level runtime library build without manual makefile copying.
Introduce some make hackery to make the low-level runtime
library build without manual makefile copying.

Swift SVN r3043

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