Update WindowsBuild.md
Update WindowsBuild.md

Default to RelWithDebInfo builds on Windows because the build times with everything debug is ludicrous.  This gives a relatively useful build for development, even though the targets built with `clang-cl` have a slightly poorer debugging experience.  This reduces the build time by an order of magnitude though.  In theory, it is possible to build a second build of LLVM and Clang to get a debug build of the swift compiler building with a release build of clang.
gribozavr/swift,CodaFi/swift,JGiola/swift,roambotics/swift,amraboelela/swift,rudkx/swift,stephentyrone/swift,JGiola/swift,amraboelela/swift,jckarter/swift,JGiola/swift,jckarter/swift,atrick/swift,gregomni/swift,benlangmuir/swift,shajrawi/swift,harlanhaskins/swift,tkremenek/swift,shahmishal/swift,aschwaighofer/swift,aschwaighofer/swift,xwu/swift,parkera/swift,harlanhaskins/swift,benlangmuir/swift,devincoughlin/swift,tkremenek/swift,gribozavr/swift,nathawes/swift,glessard/swift,hooman/swift,CodaFi/swift,jmgc/swift,shahmishal/swift,shahmishal/swift,atrick/swift,lorentey/swift,benlangmuir/swift,sschiau/swift,allevato/swift,xwu/swift,parkera/swift,roambotics/swift,shahmishal/swift,gribozavr/swift,JGiola/swift,practicalswift/swift,lorentey/swift,lorentey/swift,glessard/swift,parkera/swift,devincoughlin/swift,shajrawi/swift,devincoughlin/swift,atrick/swift,jckarter/swift,jmgc/swift,ahoppen/swift,benlangmuir/swift,amraboelela/swift,allevato/swift,ahoppen/swift,jckarter/swift,tkremenek/swift,airspeedswift/swift,aschwaighofer/swift,nathawes/swift,karwa/swift,ahoppen/swift,airspeedswift/swift,CodaFi/swift,jckarter/swift,xedin/swift,lorentey/swift,nathawes/swift,practicalswift/swift,allevato/swift,atrick/swift,karwa/swift,jmgc/swift,glessard/swift,practicalswift/swift,karwa/swift,sschiau/swift,aschwaighofer/swift,JGiola/swift,sschiau/swift,tkremenek/swift,allevato/swift,parkera/swift,rudkx/swift,airspeedswift/swift,gregomni/swift,gribozavr/swift,CodaFi/swift,sschiau/swift,aschwaighofer/swift,allevato/swift,glessard/swift,parkera/swift,shajrawi/swift,sschiau/swift,xedin/swift,roambotics/swift,harlanhaskins/swift,nathawes/swift,xedin/swift,shahmishal/swift,xwu/swift,sschiau/swift,lorentey/swift,benlangmuir/swift,jmgc/swift,amraboelela/swift,roambotics/swift,shajrawi/swift,nathawes/swift,shahmishal/swift,jckarter/swift,ahoppen/swift,ahoppen/swift,rudkx/swift,xwu/swift,parkera/swift,apple/swift,devincoughlin/swift,roambotics/swift,karwa/swift,apple/swift,practicalswift/swift,jmgc/swift,glessard/swift,amraboelela/swift,harlanhaskins/swift,rudkx/swift,karwa/swift,airspeedswift/swift,amraboelela/swift,karwa/swift,parkera/swift,xwu/swift,airspeedswift/swift,gribozavr/swift,devincoughlin/swift,hooman/swift,atrick/swift,practicalswift/swift,ahoppen/swift,hooman/swift,tkremenek/swift,benlangmuir/swift,sschiau/swift,apple/swift,apple/swift,stephentyrone/swift,CodaFi/swift,allevato/swift,harlanhaskins/swift,gribozavr/swift,gregomni/swift,stephentyrone/swift,shajrawi/swift,practicalswift/swift,karwa/swift,hooman/swift,sschiau/swift,allevato/swift,practicalswift/swift,aschwaighofer/swift,airspeedswift/swift,rudkx/swift,tkremenek/swift,stephentyrone/swift,stephentyrone/swift,lorentey/swift,devincoughlin/swift,CodaFi/swift,shajrawi/swift,jmgc/swift,devincoughlin/swift,xedin/swift,xedin/swift,gribozavr/swift,hooman/swift,xwu/swift,shahmishal/swift,lorentey/swift,roambotics/swift,shajrawi/swift,gregomni/swift,parkera/swift,CodaFi/swift,atrick/swift,airspeedswift/swift,jckarter/swift,amraboelela/swift,JGiola/swift,shahmishal/swift,hooman/swift,gregomni/swift,devincoughlin/swift,gribozavr/swift,apple/swift,lorentey/swift,xedin/swift,glessard/swift,jmgc/swift,hooman/swift,xedin/swift,harlanhaskins/swift,practicalswift/swift,harlanhaskins/swift,aschwaighofer/swift,xedin/swift,xwu/swift,stephentyrone/swift,nathawes/swift,shajrawi/swift,rudkx/swift,tkremenek/swift,karwa/swift,stephentyrone/swift,apple/swift,nathawes/swift,gregomni/swift