test: make target_codesign work on Windows
test: make target_codesign work on Windows

Assume that GNUWin32 tools are present and that we can just use echo to
stub out the command like on Linux.

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