Fix cmake rules for combined llvm/clang build dir Allow SWIFT_PATH_TO_CLANG_BUILD to point to a build dir used to build llvm and clang together.
Fix cmake rules for combined llvm/clang build dir
Allow SWIFT_PATH_TO_CLANG_BUILD to point to a build dir used to build llvm and clang together.

Swift SVN r3227

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