stdlib: Workaround for IntervalType.overlaps to avoid a SIL parser error.
stdlib: Workaround for IntervalType.overlaps to avoid a SIL parser error.

The parse_stdlib tests choke on the constraints that were there previously,
so weaken the API to only work on intervals of the same type for now.

rdar://problem/22126470

Swift SVN r30977

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