[cmake] Turn on the -Wbool-conversion flag.
[cmake] Turn on the -Wbool-conversion flag.

This would have caught a problem caused by an upstream source code change in the
merge.

Swift SVN r32925

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