Linux Test Fix: Don't include XML validation in check string
Linux Test Fix: Don't include XML validation in check string

If libxml isn't available, it can cause noise in the test.

Swift SVN r27743

ken0nek/swift,kentya6/swift,tjw/swift,codestergit/swift,xedin/swift,dduan/swift,return/swift,frootloops/swift,rudkx/swift,tkremenek/swift,khizkhiz/swift,adrfer/swift,therealbnut/swift,brentdax/swift,huonw/swift,Jnosh/swift,deyton/swift,johnno1962d/swift,ben-ng/swift,kperryua/swift,brentdax/swift,calebd/swift,Jnosh/swift,natecook1000/swift,gottesmm/swift,emilstahl/swift,return/swift,MukeshKumarS/Swift,sschiau/swift,OscarSwanros/swift,OscarSwanros/swift,Jnosh/swift,hooman/swift,shahmishal/swift,danielmartin/swift,stephentyrone/swift,slavapestov/swift,dduan/swift,JaSpa/swift,tinysun212/swift-windows,return/swift,kperryua/swift,SwiftAndroid/swift,therealbnut/swift,danielmartin/swift,gribozavr/swift,milseman/swift,djwbrown/swift,kusl/swift,modocache/swift,tjw/swift,atrick/swift,karwa/swift,benlangmuir/swift,manavgabhawala/swift,johnno1962d/swift,uasys/swift,gottesmm/swift,karwa/swift,stephentyrone/swift,danielmartin/swift,jckarter/swift,cbrentharris/swift,arvedviehweger/swift,tardieu/swift,ben-ng/swift,bitjammer/swift,ben-ng/swift,airspeedswift/swift,allevato/swift,uasys/swift,hughbe/swift,modocache/swift,swiftix/swift.old,emilstahl/swift,emilstahl/swift,dreamsxin/swift,hughbe/swift,tardieu/swift,return/swift,milseman/swift,zisko/swift,Jnosh/swift,mightydeveloper/swift,kstaring/swift,JaSpa/swift,jmgc/swift,ken0nek/swift,tinysun212/swift-windows,ahoppen/swift,sschiau/swift,modocache/swift,swiftix/swift,devincoughlin/swift,aschwaighofer/swift,karwa/swift,OscarSwanros/swift,swiftix/swift,jopamer/swift,gregomni/swift,hooman/swift,parkera/swift,LeoShimonaka/swift,aschwaighofer/swift,swiftix/swift.old,swiftix/swift.old,kentya6/swift,huonw/swift,adrfer/swift,amraboelela/swift,mightydeveloper/swift,shahmishal/swift,jmgc/swift,tinysun212/swift-windows,MukeshKumarS/Swift,allevato/swift,devincoughlin/swift,jopamer/swift,devincoughlin/swift,gottesmm/swift,JaSpa/swift,allevato/swift,tkremenek/swift,glessard/swift,bitjammer/swift,arvedviehweger/swift,aschwaighofer/swift,mightydeveloper/swift,allevato/swift,hughbe/swift,sschiau/swift,austinzheng/swift,brentdax/swift,uasys/swift,manavgabhawala/swift,calebd/swift,KrishMunot/swift,bitjammer/swift,frootloops/swift,ken0nek/swift,swiftix/swift,arvedviehweger/swift,hooman/swift,manavgabhawala/swift,jtbandes/swift,brentdax/swift,gottesmm/swift,cbrentharris/swift,frootloops/swift,kperryua/swift,huonw/swift,manavgabhawala/swift,JGiola/swift,tjw/swift,xedin/swift,stephentyrone/swift,roambotics/swift,kentya6/swift,bitjammer/swift,CodaFi/swift,Ivacker/swift,SwiftAndroid/swift,IngmarStein/swift,arvedviehweger/swift,xwu/swift,MukeshKumarS/Swift,austinzheng/swift,lorentey/swift,sdulal/swift,ken0nek/swift,russbishop/swift,jopamer/swift,xwu/swift,codestergit/swift,CodaFi/swift,CodaFi/swift,shahmishal/swift,airspeedswift/swift,lorentey/swift,jckarter/swift,kstaring/swift,rudkx/swift,uasys/swift,calebd/swift,KrishMunot/swift,devincoughlin/swift,Jnosh/swift,amraboelela/swift,calebd/swift,CodaFi/swift,arvedviehweger/swift,karwa/swift,xedin/swift,russbishop/swift,aschwaighofer/swift,xedin/swift,harlanhaskins/swift,slavapestov/swift,swiftix/swift.old,kentya6/swift,practicalswift/swift,harlanhaskins/swift,milseman/swift,karwa/swift,shajrawi/swift,natecook1000/swift,kentya6/swift,xedin/swift,adrfer/swift,milseman/swift,shahmishal/swift,parkera/swift,danielmartin/swift,kperryua/swift,dduan/swift,jtbandes/swift,nathawes/swift,jckarter/swift,glessard/swift,tardieu/swift,tardieu/swift,Ivacker/swift,shahmishal/swift,dduan/swift,kusl/swift,djwbrown/swift,frootloops/swift,tkremenek/swift,brentdax/swift,ahoppen/swift,kentya6/swift,djwbrown/swift,rudkx/swift,karwa/swift,gmilos/swift,danielmartin/swift,nathawes/swift,ben-ng/swift,brentdax/swift,harlanhaskins/swift,JGiola/swift,allevato/swift,alblue/swift,shajrawi/swift,ken0nek/swift,kusl/swift,danielmartin/swift,felix91gr/swift,natecook1000/swift,harlanhaskins/swift,kstaring/swift,codestergit/swift,LeoShimonaka/swift,parkera/swift,glessard/swift,jopamer/swift,deyton/swift,return/swift,tkremenek/swift,practicalswift/swift,kperryua/swift,sdulal/swift,zisko/swift,shajrawi/swift,kstaring/swift,sdulal/swift,austinzheng/swift,austinzheng/swift,nathawes/swift,gribozavr/swift,kstaring/swift,atrick/swift,alblue/swift,xwu/swift,xwu/swift,swiftix/swift.old,SwiftAndroid/swift,swiftix/swift,frootloops/swift,gribozavr/swift,Ivacker/swift,cbrentharris/swift,felix91gr/swift,benlangmuir/swift,roambotics/swift,airspeedswift/swift,huonw/swift,gregomni/swift,emilstahl/swift,russbishop/swift,zisko/swift,MukeshKumarS/Swift,tinysun212/swift-windows,tardieu/swift,bitjammer/swift,allevato/swift,rudkx/swift,deyton/swift,MukeshKumarS/Swift,JaSpa/swift,swiftix/swift,kstaring/swift,milseman/swift,glessard/swift,hooman/swift,parkera/swift,xedin/swift,slavapestov/swift,milseman/swift,cbrentharris/swift,huonw/swift,airspeedswift/swift,JaSpa/swift,slavapestov/swift,OscarSwanros/swift,apple/swift,aschwaighofer/swift,KrishMunot/swift,cbrentharris/swift,gmilos/swift,alblue/swift,karwa/swift,kentya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