Add a local cleanup to fix a problem in foreach expansion when the 'next()' call  would produce temporary stack allocations.  Before the dealloc_stack would get  generated at the end of the foreach sequence, a violation the stack nesting verifier caught.
Add a local cleanup to fix a problem in foreach expansion when the 'next()' call 
would produce temporary stack allocations.  Before the dealloc_stack would get 
generated at the end of the foreach sequence, a violation the stack nesting verifier
caught.


Swift SVN r11673

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