Compile swift runtime dylibs as being safe for App Extensions.
Compile swift runtime dylibs as being safe for App Extensions.

This currently produces a warning for the XCTest overlay; I'm
resolving what's the right answer here.  Either XCTest itself
needs to be compiled as app extension safe, or the overlay does
not (an easy change).

Swift SVN r17665

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