build: correct case for STREQUAL (NFC)
build: correct case for STREQUAL (NFC)

The swift variables use the upper case spelling while CMake uses mixed
case.  Use the correct case to fix the build.  This is preferable to
using MATCH to avoid the unnecessary configure time penalties.

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