Guard verifyCriticalEdges with #ifndef NDEBUG.
Guard verifyCriticalEdges with #ifndef NDEBUG.

This could noticeably improve compile time in Release builds.

Once we eliminate all calls to splitAllCriticalEdges, the we can even
remove this verification in asserts builds since normal SIL
verification will catch the issues.

atrick/swift,sschiau/swift,aschwaighofer/swift,rudkx/swift,austinzheng/swift,lorentey/swift,harlanhaskins/swift,gribozavr/swift,shajrawi/swift,karwa/swift,shajrawi/swift,jmgc/swift,xedin/swift,ahoppen/swift,jckarter/swift,danielmartin/swift,shajrawi/swift,apple/swift,JGiola/swift,stephentyrone/swift,tkremenek/swift,stephentyrone/swift,airspeedswift/swift,nathawes/swift,practicalswift/swift,shahmishal/swift,amraboelela/swift,atrick/swift,atrick/swift,apple/swift,alblue/swift,gribozavr/swift,tkremenek/swift,sschiau/swift,austinzheng/swift,ahoppen/swift,CodaFi/swift,jckarter/swift,tkremenek/swift,JGiola/swift,amraboelela/swift,glessard/swift,sschiau/swift,atrick/swift,xedin/swift,lorentey/swift,shajrawi/swift,stephentyrone/swift,gribozavr/swift,allevato/swift,shahmishal/swift,natecook1000/swift,practicalswift/swift,jckarter/swift,practicalswift/swift,gregomni/swift,karwa/swift,CodaFi/swift,xwu/swift,xwu/swift,benlangmuir/swift,devincoughlin/swift,harlanhaskins/swift,apple/swift,glessard/swift,harlanhaskins/swift,gribozavr/swift,jckarter/swift,harlanhaskins/swift,airspeedswift/swift,devincoughlin/swift,nathawes/swift,alblue/swift,danielmartin/swift,jmgc/swift,ahoppen/swift,karwa/swift,benlangmuir/swift,shajrawi/swift,xedin/swift,practicalswift/swift,roambotics/swift,hooman/swift,brentdax/swift,gribozavr/swift,austinzheng/swift,aschwaighofer/swift,nathawes/swift,brentdax/swift,danielmartin/swift,shahmishal/swift,natecook1000/swift,amraboelela/swift,jmgc/swift,danielmartin/swift,harlanhaskins/swift,xedin/swift,brentdax/swift,parkera/swift,aschwaighofer/swift,hooman/swift,xedin/swift,aschwaighofer/swift,parkera/swift,atrick/swift,stephentyrone/swift,CodaFi/swift,stephentyrone/swift,JGiola/swift,parkera/swift,lorentey/swift,rudkx/swift,gregomni/swift,benlangmuir/swift,natecook1000/swift,CodaFi/swift,airspeedswift/swift,roambotics/swift,glessard/swift,parkera/swift,alblue/swift,rudkx/swift,amraboelela/swift,parkera/swift,nathawes/swift,airspeedswift/swift,harlanhaskins/swift,xwu/swift,lorentey/swift,rudkx/swift,ahoppen/swift,austinzheng/swift,ahoppen/swift,CodaFi/swift,jmgc/swift,jckarter/swift,shajrawi/swift,xedin/swift,CodaFi/swift,jmgc/swift,amraboelela/swift,airspeedswift/swift,aschwaighofer/swift,austinzheng/swift,devincoughlin/swift,practicalswift/swift,xwu/swift,hooman/swift,apple/swift,benlangmuir/swift,rudkx/swift,jmgc/swift,sschiau/swift,benlangmuir/swift,danielmartin/swift,apple/swift,xwu/swift,karwa/swift,jmgc/swift,brentdax/swift,natecook1000/swift,JGiola/swift,practicalswift/swift,parkera/swift,xwu/swift,allevato/swift,devincoughlin/swift,tkremenek/swift,allevato/swift,sschiau/swift,gribozavr/swift,xedin/swift,aschwaighofer/swift,allevato/swift,tkremenek/swift,karwa/swift,xedin/swift,sschiau/swift,natecook1000/swift,devincoughlin/swift,lorentey/swift,shajrawi/swift,benlangmuir/swift,roambotics/swift,lorentey/swift,glessard/swift,gregomni/swift,practicalswift/swift,nathawes/swift,tkremenek/swift,danielmartin/swift,roambotics/swift,JGiola/swift,alblue/swift,shahmishal/swift,JGiola/swift,parkera/swift,amraboelela/swift,roambotics/swift,hooman/swift,gregomni/swift,hooman/swift,brentdax/swift,sschiau/swift,rudkx/swift,gregomni/swift,gregomni/swift,natecook1000/swift,devincoughlin/swift,shahmishal/swift,alblue/swift,airspeedswift/swift,lorentey/swift,brentdax/swift,jckarter/swift,ahoppen/swift,shahmishal/swift,alblue/swift,karwa/swift,shahmishal/swift,glessard/swift,parkera/swift,jckarter/swift,allevato/swift,lorentey/swift,sschiau/swift,hooman/swift,hooman/swift,devincoughlin/swift,roambotics/swift,devincoughlin/swift,atrick/swift,CodaFi/swift,amraboelela/swift,austinzheng/swift,gribozavr/swift,austinzheng/swift,harlanhaskins/swift,shahmishal/swift,alblue/swift,natecook1000/swift,glessard/swift,nathawes/swift,airspeedswift/swift,brentdax/swift,allevato/swift,allevato/swift,xwu/swift,tkremenek/swift,practicalswift/swift,apple/swift,karwa/swift,karwa/swift,nathawes/swift,aschwaighofer/swift,shajrawi/swift,stephentyrone/swift,danielmartin/swift,stephentyrone/swift,gribozavr/swift