Add .gitmirrorall directive
Add .gitmirrorall directive

[tfs-changeset: 1560604]

taylorjonl/coreclr,JosephTremoulet/coreclr,Lucrecious/coreclr,sperling/coreclr,stormleoxia/coreclr,martinwoodward/coreclr,jhendrixMSFT/coreclr,krk/coreclr,poizan42/coreclr,vinnyrom/coreclr,poizan42/coreclr,mocsy/coreclr,mokchhya/coreclr,ruben-ayrapetyan/coreclr,qiudesong/coreclr,Lucrecious/coreclr,jhendrixMSFT/coreclr,gkhanna79/coreclr,yeaicc/coreclr,LLITCHEV/coreclr,vinnyrom/coreclr,jamesqo/coreclr,ragmani/coreclr,James-Ko/coreclr,josteink/coreclr,mskvortsov/coreclr,manu-silicon/coreclr,cmckinsey/coreclr,dasMulli/coreclr,swgillespie/coreclr,ruben-ayrapetyan/coreclr,sejongoh/coreclr,ramarag/coreclr,cshung/coreclr,pgavlin/coreclr,SlavaRa/coreclr,James-Ko/coreclr,benpye/coreclr,qiudesong/coreclr,rartemev/coreclr,sejongoh/coreclr,parjong/coreclr,pgavlin/coreclr,botaberg/coreclr,ramarag/coreclr,stormleoxia/coreclr,ZhichengZhu/coreclr,AlexGhiondea/coreclr,taylorjonl/coreclr,yeaicc/coreclr,tijoytom/coreclr,ruben-ayrapetyan/coreclr,krytarowski/coreclr,pgavlin/coreclr,JonHanna/coreclr,naamunds/coreclr,roncain/coreclr,kyulee1/coreclr,mokchhya/coreclr,ruben-ayrapetyan/coreclr,mskvortsov/coreclr,neurospeech/coreclr,James-Ko/coreclr,botaberg/coreclr,russellhadley/coreclr,hseok-oh/coreclr,benpye/coreclr,neurospeech/coreclr,James-Ko/coreclr,chuck-mitchell/coreclr,LLITCHEV/coreclr,vinnyrom/coreclr,swgillespie/coreclr,josteink/coreclr,SlavaRa/coreclr,mskvortsov/coreclr,ragmani/coreclr,bartdesmet/coreclr,bartdesmet/coreclr,KrzysztofCwalina/coreclr,sejongoh/coreclr,krytarowski/coreclr,dpodder/coreclr,pgavlin/coreclr,mskvortsov/coreclr,Lucrecious/coreclr,poizan42/coreclr,sperling/coreclr,parjong/coreclr,shahid-pk/coreclr,sjsinju/coreclr,dasMulli/coreclr,JonHanna/coreclr,cmckinsey/coreclr,bartdesmet/coreclr,dasMulli/coreclr,ZhichengZhu/coreclr,jhendrixMSFT/coreclr,martinwoodward/coreclr,benpye/coreclr,wateret/coreclr,wkchoy74/coreclr,ragmani/coreclr,benpye/coreclr,cmckinsey/coreclr,sjsinju/coreclr,mmitche/coreclr,AlexGhiondea/coreclr,Godin/coreclr,AlexGhiondea/coreclr,bartonjs/coreclr,sjsinju/coreclr,bartdesmet/coreclr,russellhadley/coreclr,naamunds/coreclr,qiudesong/coreclr,martinwoodward/coreclr,Godin/coreclr,benpye/coreclr,chuck-mitchell/coreclr,roncain/coreclr,YongseopKim/coreclr,Godin/coreclr,ragmani/coreclr,shahid-pk/coreclr,mmitche/coreclr,sejongoh/coreclr,alexperovich/coreclr,rartemev/coreclr,jhendrixMSFT/coreclr,cydhaselton/coreclr,YongseopKim/coreclr,rartemev/coreclr,dpodder/coreclr,vinnyrom/coreclr,poizan42/coreclr,alexperovich/coreclr,wtgodbe/coreclr,LLITCHEV/coreclr,wateret/coreclr,poizan42/coreclr,krytarowski/coreclr,sagood/coreclr,wtgodbe/coreclr,SlavaRa/coreclr,manu-silicon/coreclr,KrzysztofCwalina/coreclr,tijoytom/coreclr,shahid-pk/coreclr,wkchoy74/coreclr,wkchoy74/coreclr,cmckinsey/coreclr,neurospeech/coreclr,swgillespie/coreclr,shahid-pk/coreclr,josteink/coreclr,ruben-ayrapetyan/coreclr,neurospeech/coreclr,schellap/coreclr,SlavaRa/coreclr,ramarag/coreclr,mokchhya/coreclr,taylorjonl/coreclr,parjong/coreclr,manu-silicon/coreclr,krytarowski/coreclr,dasMulli/coreclr,gkhanna79/coreclr,botaberg/coreclr,gkhanna79/coreclr,chuck-mitchell/coreclr,kyulee1/coreclr,martinwoodward/coreclr,bartonjs/coreclr,roncain/coreclr,bartonjs/coreclr,cshung/coreclr,Dmitry-Me/coreclr,russellhadley/coreclr,jamesqo/coreclr,sagood/coreclr,James-Ko/coreclr,kyulee1/coreclr,russellhadley/coreclr,bartonjs/coreclr,Godin/coreclr,sejongoh/coreclr,josteink/coreclr,krytarowski/coreclr,mskvortsov/coreclr,Lucrecious/coreclr,wateret/coreclr,dasMulli/coreclr,sagood/coreclr,JonHanna/coreclr,Dmitry-Me/coreclr,hseok-oh/coreclr,JonHanna/coreclr,kyulee1/coreclr,YongseopKim/coreclr,Lucrecious/coreclr,botaberg/coreclr,taylorjonl/coreclr,dpodder/coreclr,mmitche/coreclr,chuck-mitchell/coreclr,qiudesong/coreclr,sperling/coreclr,wateret/coreclr,gkhanna79/coreclr,ragmani/coreclr,JosephTremoulet/coreclr,botaberg/coreclr,JonHanna/coreclr,dasMulli/coreclr,JosephTremoulet/coreclr,andschwa/coreclr,JosephTremoulet/coreclr,ramarag/coreclr,cmckinsey/coreclr,stormleoxia/coreclr,kyulee1/coreclr,Lucrecious/coreclr,chuck-mitchell/coreclr,AlexGhiondea/coreclr,yeaicc/coreclr,mocsy/coreclr,yeaicc/coreclr,JonHanna/coreclr,JosephTremoulet/coreclr,krk/coreclr,chuck-mitchell/coreclr,cmckinsey/coreclr,roncain/coreclr,swgillespie/coreclr,KrzysztofCwalina/coreclr,hseok-oh/coreclr,tijoytom/coreclr,jhendrixMSFT/coreclr,swgillespie/coreclr,benpye/coreclr,wkchoy74/coreclr,hseok-oh/coreclr,tijoytom/coreclr,schellap/coreclr,andschwa/coreclr,shahid-pk/coreclr,sjsinju/coreclr,bartonjs/coreclr,parjong/coreclr,andschwa/coreclr,sperling/coreclr,swgillespie/coreclr,shahid-pk/coreclr,rartemev/coreclr,mmitche/coreclr,taylorjonl/coreclr,mmitche/coreclr,yeaicc/coreclr,sperling/coreclr,josteink/coreclr,LLITCHEV/coreclr,wtgodbe/coreclr,bartonjs/coreclr,cydhaselton/coreclr,KrzysztofCwalina/coreclr,schellap/coreclr,parjong/coreclr,alexperovich/coreclr,Godin/coreclr,yizhang82/coreclr,ZhichengZhu/coreclr,stormleoxia/coreclr,bartdesmet/coreclr,mokchhya/coreclr,neurospeech/coreclr,naamunds/coreclr,vinnyrom/c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