test: simplify `%target-build-swift` on Windows
test: simplify `%target-build-swift` on Windows

Behave like macOS and do not add a `-module-cache-path` argument in the
`%target-build-swift` substitution.  In the cases it was needed, we
would end up with it duplicated which just complicates the command line
and makes it harder to debug.

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