[cmake] Add an optional message parameter to precondition to allow for more specific precondition messages.
[cmake] Add an optional message parameter to precondition to allow for more specific precondition messages.

danielmartin/swift,apple/swift,lorentey/swift,deyton/swift,shahmishal/swift,ben-ng/swift,rudkx/swift,jmgc/swift,tardieu/swift,brentdax/swift,airspeedswift/swift,karwa/swift,uasys/swift,felix91gr/swift,hughbe/swift,modocache/swift,kperryua/swift,stephentyrone/swift,CodaFi/swift,airspeedswift/swift,shahmishal/swift,stephentyrone/swift,OscarSwanros/swift,practicalswift/swift,rudkx/swift,apple/swift,uasys/swift,kperryua/swift,huonw/swift,jmgc/swift,gmilos/swift,OscarSwanros/swift,karwa/swift,karwa/swift,parkera/swift,alblue/swift,tjw/swift,djwbrown/swift,uasys/swift,jopamer/swift,gribozavr/swift,nathawes/swift,devincoughlin/swift,modocache/swift,milseman/swift,jtbandes/swift,felix91gr/swift,huonw/swift,parkera/swift,tkremenek/swift,sschiau/swift,alblue/swift,tardieu/swift,practicalswift/swift,ben-ng/swift,danielmartin/swift,karwa/swift,ben-ng/swift,Jnosh/swift,practicalswift/swift,roambotics/swift,djwbrown/swift,tinysun212/swift-windows,amraboelela/swift,tjw/swift,frootloops/swift,parkera/swift,glessard/swift,codestergit/swift,return/swift,austinzheng/swift,apple/swift,OscarSwanros/swift,harlanhaskins/swift,calebd/swift,tkremenek/swift,gribozavr/swift,djwbrown/swift,shajrawi/swift,atrick/swift,gottesmm/swift,parkera/swift,rudkx/swift,CodaFi/swift,allevato/swift,airspeedswift/swift,gottesmm/swift,natecook1000/swift,milseman/swift,gregomni/swift,milseman/swift,milseman/swift,codestergit/swift,allevato/swift,JaSpa/swift,ahoppen/swift,deyton/swift,sschiau/swift,natecook1000/swift,airspeedswift/swift,kstaring/swift,aschwaighofer/swift,jtbandes/swift,manavgabhawala/swift,atrick/swift,harlanhaskins/swift,IngmarStein/swift,modocache/swift,practicalswift/swift,manavgabhawala/swift,therealbnut/swift,OscarSwanros/swift,huonw/swift,zisko/swift,lorentey/swift,xedin/swift,austinzheng/swift,apple/swift,ahoppen/swift,gmilos/swift,gregomni/swift,hughbe/swift,swiftix/swift,tjw/swift,arvedviehweger/swift,jopamer/swift,jckarter/swift,aschwaighofer/swift,lorentey/swift,JaSpa/swift,felix91gr/swift,hughbe/swift,frootloops/swift,frootloops/swift,harlanhaskins/swift,devincoughlin/swift,hughbe/swift,tinysun212/swift-windows,atrick/swift,shahmishal/swift,jckarter/swift,modocache/swift,jtbandes/swift,airspeedswift/swift,CodaFi/swift,shahmishal/swift,zisko/swift,kperryua/swift,hooman/swift,tjw/swift,stephentyrone/swift,kstaring/swift,tkremenek/swift,roambotics/swift,ben-ng/swift,parkera/swift,JGiola/swift,atrick/swift,kperryua/swift,amraboelela/swift,shajrawi/swift,codestergit/swift,return/swift,gribozavr/swift,return/swift,karwa/swift,gottesmm/swift,xwu/swift,ahoppen/swift,allevato/swift,sschiau/swift,atrick/swift,Jnosh/swift,milseman/swift,amraboelela/swift,lorentey/swift,uasys/swift,jopamer/swift,calebd/swift,IngmarStein/swift,calebd/swift,zisko/swift,swiftix/swift,uasys/swift,xwu/swift,nathawes/swift,airspeedswift/swift,karwa/swift,brentdax/swift,hughbe/swift,sschiau/swift,arvedviehweger/swift,harlanhaskins/swift,hughbe/swift,apple/swift,gregomni/swift,frootloops/swift,gottesmm/swift,xedin/swift,manavgabhawala/swift,JaSpa/swift,devincoughlin/swift,gribozavr/swift,CodaFi/swift,arvedviehweger/swift,therealbnut/swift,xedin/swift,huonw/swift,tkremenek/swift,sschiau/swift,modocache/swift,danielmartin/swift,bitjammer/swift,zisko/swift,lorentey/swift,roambotics/swift,austinzheng/swift,allevato/swift,natecook1000/swift,bitjammer/swift,felix91gr/swift,therealbnut/swift,uasys/swift,glessard/swift,ahoppen/swift,return/swift,milseman/swift,harlanhaskins/swift,tinysun212/swift-windows,swiftix/swift,felix91gr/swift,djwbrown/swift,austinzheng/swift,gottesmm/swift,tinysun212/swift-windows,amraboelela/swift,alblue/swift,milseman/swift,codestergit/swift,frootloops/swift,devincoughlin/swift,JGiola/swift,jtbandes/swift,hooman/swift,practicalswift/swift,allevato/swift,hooman/swift,swiftix/swift,jopamer/swift,xedin/swift,calebd/swift,kperryua/swift,hooman/swift,stephentyrone/swift,huonw/swift,JGiola/swift,gregomni/swift,IngmarStein/swift,sschiau/swift,jmgc/swift,nathawes/swift,allevato/swift,manavgabhawala/swift,roambotics/swift,austinzheng/swift,aschwaighofer/swift,codestergit/swift,return/swift,alblue/swift,roambotics/swift,JaSpa/swift,shahmishal/swift,alblue/swift,jmgc/swift,bitjammer/swift,gmilos/swift,bitjammer/swift,calebd/swift,jckarter/swift,glessard/swift,shajrawi/swift,OscarSwanros/swift,gottesmm/swift,deyton/swift,uasys/swift,tardieu/swift,benlangmuir/swift,xwu/swift,hughbe/swift,IngmarStein/swift,bitjammer/swift,tardieu/swift,jmgc/swift,gribozavr/swift,parkera/swift,jmgc/swift,therealbnut/swift,sschiau/swift,austinzheng/swift,danielmartin/swift,ahoppen/swift,jtbandes/swift,xwu/swift,brentdax/swift,frootloops/swift,JaSpa/swift,zisko/swift,devincoughlin/swift,therealbnut/swift,tjw/swift,austinzheng/swift,deyton/swift,shajrawi/swift,nathawes/swift,amraboelela/swift,manavgabhawala/swift,kperryua/swift,djwbrown/swift,jckarter/swift,huonw/swift,aschwaighofer/swift,tjw/swift,jopamer/swift,arvedviehweger/swift,gmilos/swift,lorentey/swift,zisko/swift,danielmartin/swift,benlangmuir/swift,xedin/swift,practicalswift/swift,xwu/swift,shahmishal/swift,kstaring/swift,natecook1000/swift,JGiola/swift,roambotics/swift,jmgc/swift,xedin/swift,shajrawi/swift,therealbnut/swift,djwbrown/swift,calebd/swift,tjw/swift,nathawes/swift,jckarter/swift,practicalswift/swift,kstaring/swift,codestergit/swift,felix91gr/swift,ahoppen/swift,jckarter/swift,JaSpa/swift,benlangmuir/swift,return/swift,bitjammer/swift,modocache/swift,Jnosh/swift,aschwaighofer/swift,devincoughlin/swift,aschwaighofer/swift,alblue/swift,felix91gr/swift,hooman/swift,stephentyrone/swift,swiftix/swift,bitjammer/swift,zisko/swift,allevato/swift,gribozavr/swift,hooman/swift,modocache/swift,tkremenek/swift,xwu/swift,jtbandes/swift,tkremenek/swift,CodaFi/swift,swiftix/swift,Jnosh/swift,parkera/swift,kstaring/swift,tinysun212/swift-windows,harlanhaskins/swift,gribozavr/swift,xedin/swift,natecook1000/swift,manavgabhawala/swift,glessard/swift,amraboelela/swift,benlangmuir/swift,natecook1000/swift,deyton/swift,shahmishal/swift,codestergit/swift,parkera/swift,JGiola/swift,karwa/swift,gmilos/swift,aschwaighofer/swift,brentdax/swift,jopamer/swift,stephentyrone/swift,jtbandes/swift,jopamer/swift,OscarSwanros/swift,practicalswift/swift,natecook1000/swift,danielmartin/swift,huonw/swift,brentdax/swift,calebd/swift,xwu/swift,devincoughlin/swift,kstaring/swift,ben-ng/swift,gottesmm/swift,swiftix/swift,rudkx/swift,gmilos/swift,tinysun212/swift-windows,tardieu/swift,danielmartin/swift,karwa/swift,shajrawi/swift,frootloops/swift,atrick/swift,gribozavr/swift,arvedviehweger/swift,shajrawi/swift,tkremenek/swift,gregomni/swift,devincoughlin/swift,lorentey/swift,glessard/swift,Jnosh/swift,benlangmuir/swift,xedin/swift,brentdax/swift,amraboelela/swift,CodaFi/swift,glessard/swift,nathawes/swift,sschiau/swift,OscarSwanros/swift,tinysun212/swift-windows,brentdax/swift,deyton/swift,shajrawi/swift,tardieu/swift,kperryua/swift,manavgabhawala/swift,deyton/swift,Jnosh/swift,return/swift,nathawes/swift,jckarter/swift,harlanhaskins/swift,Jnosh/swift,lorentey/swift,gregomni/swift,JaSpa/swift,hooman/swift,JGiola/swift,djwbrown/swift,arvedviehweger/swift,benlangmuir/swift,rudkx/swift,therealbnut/swift,alblue/swift,airspeedswift/swift,IngmarStein/swift,rudkx/swift,shahmishal/swift,kstaring/swift,tardieu/swift,IngmarStein/swift,stephentyrone/swift,gmilos/swift,IngmarStein/swift,CodaFi/swift,ben-ng/swift,arvedviehweger/swift,apple/swift,ben-ng/swift