Patch the runtests.sh script to work around an issue with corefx assemblies
Patch the runtests.sh script to work around an issue with corefx assemblies

Change https://github.com/dotnet/corefx/pull/6779 in CoreFx added corert
assemblies to the mix of assemblies that are built for CoreCLR on Unix
which broke the logic in runtest.sh that creates an overlay for running
tests. This change creates a work around for the problem.

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