docs: add documentation for libdispatch on windows
docs: add documentation for libdispatch on windows

Add documentation for building libdispatch on Windows.  This is needed for building foundation.  Clean up some mistakes while here.  Adjust the swift-corelibs-foundation build to start building the swift side of the world as well.
rudkx/swift,roambotics/swift,shahmishal/swift,xwu/swift,shajrawi/swift,lorentey/swift,parkera/swift,jmgc/swift,nathawes/swift,devincoughlin/swift,sschiau/swift,karwa/swift,xwu/swift,JGiola/swift,xedin/swift,roambotics/swift,nathawes/swift,jckarter/swift,allevato/swift,benlangmuir/swift,xedin/swift,jckarter/swift,CodaFi/swift,CodaFi/swift,practicalswift/swift,lorentey/swift,apple/swift,karwa/swift,airspeedswift/swift,xwu/swift,devincoughlin/swift,shahmishal/swift,karwa/swift,parkera/swift,austinzheng/swift,xedin/swift,karwa/swift,atrick/swift,shajrawi/swift,jckarter/swift,airspeedswift/swift,jmgc/swift,xedin/swift,austinzheng/swift,danielmartin/swift,shajrawi/swift,rudkx/swift,allevato/swift,roambotics/swift,gribozavr/swift,lorentey/swift,allevato/swift,airspeedswift/swift,aschwaighofer/swift,parkera/swift,hooman/swift,allevato/swift,benlangmuir/swift,austinzheng/swift,roambotics/swift,austinzheng/swift,shajrawi/swift,parkera/swift,karwa/swift,shahmishal/swift,parkera/swift,danielmartin/swift,allevato/swift,hooman/swift,practicalswift/swift,aschwaighofer/swift,sschiau/swift,hooman/swift,tkremenek/swift,practicalswift/swift,apple/swift,tkremenek/swift,harlanhaskins/swift,rudkx/swift,shajrawi/swift,devincoughlin/swift,jmgc/swift,amraboelela/swift,austinzheng/swift,JGiola/swift,harlanhaskins/swift,rudkx/swift,nathawes/swift,amraboelela/swift,lorentey/swift,hooman/swift,ahoppen/swift,aschwaighofer/swift,parkera/swift,aschwaighofer/swift,shahmishal/swift,lorentey/swift,ahoppen/swift,benlangmuir/swift,jckarter/swift,karwa/swift,austinzheng/swift,lorentey/swift,devincoughlin/swift,amraboelela/swift,jmgc/swift,apple/swift,amraboelela/swift,gribozavr/swift,devincoughlin/swift,danielmartin/swift,jckarter/swift,apple/swift,jmgc/swift,harlanhaskins/swift,shajrawi/swift,CodaFi/swift,gribozavr/swift,jmgc/swift,practicalswift/swift,practicalswift/swift,airspeedswift/swift,danielmartin/swift,stephentyrone/swift,stephentyrone/swift,sschiau/swift,allevato/swift,stephentyrone/swift,shajrawi/swift,gribozavr/swift,xedin/swift,tkremenek/swift,aschwaighofer/swift,airspeedswift/swift,roambotics/swift,hooman/swift,karwa/swift,harlanhaskins/swift,glessard/swift,JGiola/swift,practicalswift/swift,tkremenek/swift,amraboelela/swift,glessard/swift,atrick/swift,gribozavr/swift,ahoppen/swift,stephentyrone/swift,sschiau/swift,glessard/swift,shahmishal/swift,atrick/swift,tkremenek/swift,jckarter/swift,karwa/swift,nathawes/swift,practicalswift/swift,hooman/swift,gribozavr/swift,gregomni/swift,xwu/swift,hooman/swift,harlanhaskins/swift,sschiau/swift,gregomni/swift,stephentyrone/swift,gribozavr/swift,harlanhaskins/swift,ahoppen/swift,airspeedswift/swift,atrick/swift,xedin/swift,jmgc/swift,atrick/swift,gregomni/swift,aschwaighofer/swift,ahoppen/swift,nathawes/swift,rudkx/swift,amraboelela/swift,parkera/swift,devincoughlin/swift,sschiau/swift,gregomni/swift,shahmishal/swift,austinzheng/swift,lorentey/swift,devincoughlin/swift,nathawes/swift,xwu/swift,lorentey/swift,danielmartin/swift,ahoppen/swift,CodaFi/swift,stephentyrone/swift,CodaFi/swift,airspeedswift/swift,tkremenek/swift,xedin/swift,roambotics/swift,tkremenek/swift,devincoughlin/swift,shahmishal/swift,nathawes/swift,gribozavr/swift,shahmishal/swift,stephentyrone/swift,atrick/swift,benlangmuir/swift,parkera/swift,glessard/swift,JGiola/swift,sschiau/swift,apple/swift,shajrawi/swift,harlanhaskins/swift,danielmartin/swift,xwu/swift,xedin/swift,glessard/swift,aschwaighofer/swift,glessard/swift,allevato/swift,xwu/swift,gregomni/swift,jckarter/swift,CodaFi/swift,CodaFi/swift,gregomni/swift,sschiau/swift,amraboelela/swift,rudkx/swift,danielmartin/swift,JGiola/swift,practicalswift/swift,benlangmuir/swift,JGiola/swift,apple/swift,benlangmuir/swift