Consolidate enabling of xplat binary downloads into GetXPlatBinaries.targets. Disable xplat build for SSV builds.
Consolidate enabling of xplat binary downloads into GetXPlatBinaries.targets.
Disable xplat build for SSV builds.

[tfs-changeset: 1514806]

Dmitry-Me/coreclr,sperling/coreclr,SlavaRa/coreclr,tijoytom/coreclr,ericeil/coreclr,dasMulli/coreclr,Alcaro/coreclr,bartdesmet/coreclr,shahid-pk/coreclr,xoofx/coreclr,ktos/coreclr,serenabenny/coreclr,yizhang82/coreclr,James-Ko/coreclr,martinwoodward/coreclr,ytechie/coreclr,rartemev/coreclr,schellap/coreclr,mocsy/coreclr,martinwoodward/coreclr,gkhanna79/coreclr,manu-silicon/coreclr,ktos/coreclr,dpodder/coreclr,chrishaly/coreclr,iamjasonp/coreclr,SpotLabsNET/coreclr,iamjasonp/coreclr,josteink/coreclr,russellhadley/coreclr,wateret/coreclr,benpye/coreclr,JonHanna/coreclr,chrishaly/coreclr,Djuffin/coreclr,jamesqo/coreclr,cmckinsey/coreclr,wateret/coreclr,OryJuVog/coreclr,gkhanna79/coreclr,Samana/coreclr,Dmitry-Me/coreclr,shana/coreclr,JosephTremoulet/coreclr,ericeil/coreclr,yeaicc/coreclr,YongseopKim/coreclr,mskvortsov/coreclr,ruben-ayrapetyan/coreclr,matthubin/coreclr,zmaruo/coreclr,mocsy/coreclr,SpotLabsNET/coreclr,KrzysztofCwalina/coreclr,yeaicc/coreclr,wkchoy74/coreclr,chrishaly/coreclr,benpye/coreclr,rartemev/coreclr,alexperovich/coreclr,kyulee1/coreclr,AlfredoMS/coreclr,sejongoh/coreclr,JonHanna/coreclr,Sridhar-MS/coreclr,roncain/coreclr,ZhichengZhu/coreclr,ruben-ayrapetyan/coreclr,ericeil/coreclr,wtgodbe/coreclr,Lucrecious/coreclr,AlexGhiondea/coreclr,MCGPPeters/coreclr,jamesqo/coreclr,chaos7theory/coreclr,stormleoxia/coreclr,vinnyrom/coreclr,botaberg/coreclr,ramarag/coreclr,perfectphase/coreclr,Alcaro/coreclr,OryJuVog/coreclr,blackdwarf/coreclr,SpotLabsNET/coreclr,geertdoornbos/coreclr,mokchhya/coreclr,roncain/coreclr,gitchomik/coreclr,krixalis/coreclr,Lucrecious/coreclr,hseok-oh/coreclr,shahid-pk/coreclr,dpodder/coreclr,rartemev/coreclr,ytechie/coreclr,andschwa/coreclr,alexperovich/coreclr,pgavlin/coreclr,poizan42/coreclr,krytarowski/coreclr,krytarowski/coreclr,stormleoxia/coreclr,wtgodbe/coreclr,qiudesong/coreclr,stormleoxia/coreclr,gitchomik/coreclr,James-Ko/coreclr,jamesqo/coreclr,MCGPPeters/coreclr,botaberg/coreclr,SlavaRa/coreclr,shahid-pk/coreclr,poizan42/coreclr,roncain/coreclr,botaberg/coreclr,jamesqo/coreclr,pgavlin/coreclr,ZhichengZhu/coreclr,LLITCHEV/coreclr,neurospeech/coreclr,jhendrixMSFT/coreclr,mskvortsov/coreclr,gkhanna79/coreclr,schellap/coreclr,gkhanna79/coreclr,alexperovich/coreclr,YongseopKim/coreclr,JosephTremoulet/coreclr,ZhichengZhu/coreclr,Dmitry-Me/coreclr,shana/coreclr,serenabenny/coreclr,rartemev/coreclr,alexperovich/coreclr,krixalis/coreclr,Sridhar-MS/coreclr,swgillespie/coreclr,naamunds/coreclr,serenabenny/coreclr,chrishaly/coreclr,LLITCHEV/coreclr,cmckinsey/coreclr,yeaicc/coreclr,bartonjs/coreclr,tijoytom/coreclr,LLITCHEV/coreclr,AlfredoMS/coreclr,chaos7theory/coreclr,krytarowski/coreclr,bitcrazed/coreclr,wateret/coreclr,andschwa/coreclr,Alcaro/coreclr,iamjasonp/coreclr,orthoxerox/coreclr,roncain/coreclr,gkhanna79/coreclr,neurospeech/coreclr,GuilhermeSa/coreclr,YongseopKim/coreclr,JonHanna/coreclr,andschwa/coreclr,sperling/coreclr,geertdoornbos/coreclr,MCGPPeters/coreclr,schellap/coreclr,sperling/coreclr,pgavlin/coreclr,cshung/coreclr,JosephTremoulet/coreclr,blackdwarf/coreclr,vinnyrom/coreclr,mskvortsov/coreclr,ytechie/coreclr,kyulee1/coreclr,dkorolev/coreclr,benpye/coreclr,Sridhar-MS/coreclr,Lucrecious/coreclr,josteink/coreclr,manu-silicon/coreclr,krixalis/coreclr,MCGPPeters/coreclr,jhendrixMSFT/coreclr,bjjones/coreclr,bjjones/coreclr,dasMulli/coreclr,dasMulli/coreclr,schellap/coreclr,krixalis/coreclr,James-Ko/coreclr,dasMulli/coreclr,bartonjs/coreclr,mmitche/coreclr,Djuffin/coreclr,jhendrixMSFT/coreclr,stormleoxia/coreclr,ramarag/coreclr,bartdesmet/coreclr,sagood/coreclr,MCGPPeters/coreclr,chaos7theory/coreclr,orthoxerox/coreclr,mocsy/coreclr,taylorjonl/coreclr,perfectphase/coreclr,mokchhya/coreclr,AlfredoMS/coreclr,matthubin/coreclr,serenabenny/coreclr,naamunds/coreclr,AlfredoMS/coreclr,bitcrazed/coreclr,taylorjonl/coreclr,sperling/coreclr,krk/coreclr,SpotLabsNET/coreclr,botaberg/coreclr,wkchoy74/coreclr,yeaicc/coreclr,bitcrazed/coreclr,josteink/coreclr,AlexGhiondea/coreclr,Samana/coreclr,chuck-mitchell/coreclr,perfectphase/coreclr,zmaruo/coreclr,josteink/coreclr,ragmani/coreclr,cmckinsey/coreclr,jamesqo/coreclr,xoofx/coreclr,vinnyrom/coreclr,parjong/coreclr,AlfredoMS/coreclr,stormleoxia/coreclr,ktos/coreclr,blackdwarf/coreclr,KrzysztofCwalina/coreclr,Djuffin/coreclr,geertdoornbos/coreclr,wkchoy74/coreclr,chrishaly/coreclr,JonHanna/coreclr,ktos/coreclr,xoofx/coreclr,roncain/coreclr,shahid-pk/coreclr,ragmani/coreclr,KrzysztofCwalina/coreclr,mocsy/coreclr,dpodder/coreclr,sejongoh/coreclr,kyulee1/coreclr,manu-silicon/coreclr,ramarag/coreclr,matthubin/coreclr,ruben-ayrapetyan/coreclr,YongseopKim/coreclr,sjsinju/coreclr,cmckinsey/coreclr,rartemev/coreclr,AlexGhiondea/coreclr,ruben-ayrapetyan/coreclr,Godin/coreclr,wkchoy74/coreclr,qiudesong/coreclr,wtgodbe/coreclr,vinnyrom/coreclr,xoofx/coreclr,gitchomik/coreclr,yizhang82/coreclr,martinwoodward/coreclr,dasMulli/coreclr,cshung/coreclr,swgillespie/coreclr,Sridhar-MS/coreclr,sagood/coreclr,chaos7theory/coreclr,Alcaro/coreclr,bit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kvortsov/coreclr,geertdoornbos/coreclr,hseok-oh/coreclr,chaos7theory/coreclr,bartdesmet/coreclr,dpodder/coreclr,Samana/coreclr,swgillespie/coreclr,cydhaselton/coreclr,cshung/coreclr,alexperovich/coreclr,blackdwarf/coreclr,dpodder/coreclr,SlavaRa/coreclr,josteink/coreclr,mocsy/coreclr,gitchomik/coreclr,DasAllFolks/coreclr,chuck-mitchell/coreclr,DasAllFolks/coreclr,cshung/coreclr,qiudesong/coreclr,iamjasonp/coreclr,gitchomik/coreclr,James-Ko/coreclr,cydhaselton/coreclr,benpye/coreclr,krk/coreclr,vinnyrom/coreclr,cshung/coreclr,sjsinju/coreclr,serenabenny/coreclr,russellhadley/coreclr,schellap/coreclr,jhendrixMSFT/coreclr,russellhadley/coreclr,botaberg/coreclr,Djuffin/coreclr,manu-silicon/coreclr,bartdesmet/coreclr,ericeil/coreclr,wkchoy74/coreclr,martinwoodward/coreclr,krixalis/coreclr,perfectphase/coreclr,KrzysztofCwalina/coreclr,hseok-oh/coreclr,hseok-oh/coreclr,alexperovich/coreclr,mocsy/coreclr