[cmake]: Ensure that swift-api-digester rebuilds before tests are run.
[cmake]: Ensure that swift-api-digester rebuilds before tests are run.

Fixes rdar://problem/28953348

frootloops/swift,bitjammer/swift,benlangmuir/swift,harlanhaskins/swift,codestergit/swift,swiftix/swift,xwu/swift,parkera/swift,deyton/swift,benlangmuir/swift,brentdax/swift,huonw/swift,milseman/swift,allevato/swift,gribozavr/swift,return/swift,hughbe/swift,uasys/swift,jckarter/swift,alblue/swift,djwbrown/swift,ben-ng/swift,deyton/swift,shahmishal/swift,nathawes/swift,gottesmm/swift,ahoppen/swift,gregomni/swift,shajrawi/swift,hughbe/swift,nathawes/swift,codestergit/swift,Jnosh/swift,shajrawi/swift,felix91gr/swift,shajrawi/swift,benlangmuir/swift,glessard/swift,gottesmm/swift,djwbrown/swift,lorentey/swift,atrick/swift,tkremenek/swift,sschiau/swift,sschiau/swift,djwbrown/swift,amraboelela/swift,tardieu/swift,calebd/swift,devincoughlin/swift,codestergit/swift,ben-ng/swift,huonw/swift,amraboelela/swift,tjw/swift,ben-ng/swift,xedin/swift,shajrawi/swift,felix91gr/swift,OscarSwanros/swift,harlanhaskins/swift,djwbrown/swift,bitjammer/swift,zisko/swift,gribozavr/swift,aschwaighofer/swift,uasys/swift,gmilos/swift,rudkx/swift,JGiola/swift,xedin/swift,JGiola/swift,CodaFi/swift,jckarter/swift,jopamer/swift,alblue/swift,parkera/swift,gmilos/swift,CodaFi/swift,shahmishal/swift,devincoughlin/swift,roambotics/swift,roambotics/swift,nathawes/swift,glessard/swift,felix91gr/swift,arvedviehweger/swift,return/swift,CodaFi/swift,zisko/swift,danielmartin/swift,sschiau/swift,glessard/swift,natecook1000/swift,gregomni/swift,arvedviehweger/swift,stephentyrone/swift,gribozavr/swift,devincoughlin/swift,aschwaighofer/swift,zisko/swift,Jnosh/swift,frootloops/swift,roambotics/swift,apple/swift,jopamer/swift,jmgc/swift,tkremenek/swift,harlanhaskins/swift,amraboelela/swift,Jnosh/swift,shajrawi/swift,jckarter/swift,gmilos/swift,glessard/swift,danielmartin/swift,return/swift,manavgabhawala/swift,xedin/swift,alblue/swift,return/swift,xedin/swift,huonw/swift,gribozavr/swift,JGiola/swift,tkremenek/swift,therealbnut/swift,atrick/swift,tardieu/swift,lorentey/swift,djwbrown/swift,hooman/swift,hughbe/swift,roambotics/swift,milseman/swift,tkremenek/swift,calebd/swift,swiftix/swift,therealbnut/swift,ben-ng/swift,shahmishal/swift,gregomni/swift,alblue/swift,calebd/swift,arvedviehweger/swift,frootloops/swift,jckarter/swift,kstaring/swift,uasys/swift,parkera/swift,atrick/swift,jopamer/swift,codestergit/swift,shajrawi/swift,JGiola/swift,jtbandes/swift,codestergit/swift,kstaring/swift,danielmartin/swift,xwu/swift,felix91gr/swift,Jnosh/swift,brentdax/swift,apple/swift,austinzheng/swift,glessard/swift,stephentyrone/swift,gribozavr/swift,zisko/swift,stephentyrone/swift,allevato/swift,tardieu/swift,gottesmm/swift,shahmishal/swift,shahmishal/swift,tardieu/swift,natecook1000/swift,sschiau/swift,huonw/swift,sschiau/swift,austinzheng/swift,gottesmm/swift,aschwaighofer/swift,airspeedswift/swift,hughbe/swift,karwa/swift,hooman/swift,rudkx/swift,manavgabhawala/swift,uasys/swift,bitjammer/swift,felix91gr/swift,gmilos/swift,JaSpa/swift,roambotics/swift,airspeedswift/swift,xwu/swift,natecook1000/swift,xwu/swift,zisko/swift,return/swift,bitjammer/swift,gribozavr/swift,parkera/swift,jopamer/swift,calebd/swift,hughbe/swift,JaSpa/swift,frootloops/swift,alblue/swift,swiftix/swift,huonw/swift,shahmishal/swift,milseman/swift,danielmartin/swift,milseman/swift,karwa/swift,karwa/swift,jmgc/swift,jmgc/swift,parkera/swift,atrick/swift,harlanhaskins/swift,devincoughlin/swift,frootloops/swift,kstaring/swift,manavgabhawala/swift,jtbandes/swift,tjw/swift,danielmartin/swift,austinzheng/swift,lorentey/swift,gmilos/swift,practicalswift/swift,jopamer/swift,jckarter/swift,kstaring/swift,practicalswift/swift,sschiau/swift,apple/swift,nathawes/swift,Jnosh/swift,karwa/swift,arvedviehweger/swift,rudkx/swift,tjw/swift,hooman/swift,tardieu/swift,calebd/swift,milseman/swift,jmgc/swift,tardieu/swift,lorentey/swift,tjw/swift,codestergit/swift,tinysun212/swift-windows,codestergit/swift,return/swift,jopamer/swift,JaSpa/swift,jckarter/swift,glessard/swift,natecook1000/swift,arvedviehweger/swift,rudkx/swift,deyton/swift,austinzheng/swift,therealbnut/swift,CodaFi/swift,danielmartin/swift,danielmartin/swift,alblue/swift,tkremenek/swift,lorentey/swift,airspeedswift/swift,bitjammer/swift,manavgabhawala/swift,stephentyrone/swift,devincoughlin/swift,brentdax/swift,hooman/swift,tinysun212/swift-windows,OscarSwanros/swift,JaSpa/swift,tjw/swift,devincoughlin/swift,natecook1000/swift,djwbrown/swift,arvedviehweger/swift,jmgc/swift,xwu/swift,gregomni/swift,hooman/swift,manavgabhawala/swift,kstaring/swift,deyton/swift,bitjammer/swift,natecook1000/swift,parkera/swift,zisko/swift,aschwaighofer/swift,kstaring/swift,xedin/swift,devincoughlin/swift,benlangmuir/swift,JaSpa/swift,tinysun212/swift-windows,swiftix/swift,amraboelela/swift,tkremenek/swift,practicalswift/swift,swiftix/swift,tinysun212/swift-windows,aschwaighofer/swift,JGiola/swift,harlanhaskins/swift,stephentyrone/swift,ahoppen/swift,airspeedswift/swift,airspeedswift/swift,tardieu/swift,deyton/swift,gregomni/swift,practicalswift/swift,shahmishal/swift,ahoppen/swift,xedin/swift,austinzheng/swift,OscarSwanros/swift,stephentyrone/swift,therealbnut/swift,practicalswift/swift,Jnosh/swift,harlanhaskins/swift,benlangmuir/swift,aschwaighofer/swift,airspeedswift/swift,JaSpa/swift,JGiola/swift,jtbandes/swift,jckarter/swift,parkera/swift,devincoughlin/swift,shajrawi/swift,zisko/swift,Jnosh/swift,manavgabhawala/swift,ben-ng/swift,nathawes/swift,swiftix/swift,gmilos/swift,xwu/swift,brentdax/swift,allevato/swift,alblue/swift,allevato/swift,parkera/swift,brentdax/swift,JaSpa/swift,kstaring/swift,allevato/swift,airspeedswift/swift,gottesmm/swift,practicalswift/swift,austinzheng/swift,milseman/swift,amraboelela/swift,sschiau/swift,amraboelela/swift,tjw/swift,hughbe/swift,atrick/swift,frootloops/swift,gribozavr/swift,lorentey/swift,jmgc/swift,amraboelela/swift,allevato/swift,practicalswift/swift,lorentey/swift,apple/swift,djwbrown/swift,uasys/swift,gribozavr/swift,uasys/swift,gottesmm/swift,ahoppen/swift,ben-ng/swift,nathawes/swift,bitjammer/swift,practicalswift/swift,nathawes/swift,calebd/swift,allevato/swift,karwa/swift,OscarSwanros/swift,rudkx/swift,gregomni/swift,rudkx/swift,huonw/swift,austinzheng/swift,benlangmuir/swift,aschwaighofer/swift,CodaFi/swift,shajrawi/swift,apple/swift,karwa/swift,uasys/swift,deyton/swift,therealbnut/swift,jtbandes/swift,apple/swift,felix91gr/swift,xedin/swift,jopamer/swift,ben-ng/swift,CodaFi/swift,jtbandes/swift,deyton/swift,lorentey/swift,milseman/swift,jtbandes/swift,tjw/swift,therealbnut/swift,tinysun212/swift-windows,ahoppen/swift,brentdax/swift,OscarSwanros/swift,frootloops/swift,OscarSwanros/swift,sschiau/swift,gmilos/swift,swiftix/swift,shahmishal/swift,roambotics/swift,jtbandes/swift,manavgabhawala/swift,CodaFi/swift,natecook1000/swift,atrick/swift,jmgc/swift,brentdax/swift,hooman/swift,hughbe/swift,therealbnut/swift,arvedviehweger/swift,xedin/swift,tinysun212/swift-windows,return/swift,harlanhaskins/swift,stephentyrone/swift,OscarSwanros/swift,karwa/swift,karwa/swift,tkremenek/swift,ahoppen/swift,xwu/swift,hooman/swift,tinysun212/swift-windows,gottesmm/swift,huonw/swift,felix91gr/swift,calebd/swift