CMake: Add explicit library path for linking against Swift stdlib libraries.
CMake: Add explicit library path for linking against Swift stdlib libraries.

This is needed because of autolinking, which doesn't know where to find
these libraries. In the Makefile build, lib/swift is just a symlink back to
lib/, so the default LLVM config is good enough, but the CMake build
actually makes a subdirectory.

Swift SVN r7593

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