Update DllImport logic to support lack of "lib" prefix
Update DllImport logic to support lack of "lib" prefix

Today the runtime supports automatically appending an appropriate
suffix (e.g. ".so", ".dylib", etc.) for the library name provided
to DllImport.  This commit adds support for also prepending the
standard library prefix "lib".

gitchomik/coreclr,MCGPPeters/coreclr,vinnyrom/coreclr,GuilhermeSa/coreclr,manu-silicon/coreclr,russellhadley/coreclr,YongseopKim/coreclr,martinwoodward/coreclr,yeaicc/coreclr,matthubin/coreclr,ganeshran/coreclr,neurospeech/coreclr,mokchhya/coreclr,vinnyrom/coreclr,Godin/coreclr,mokchhya/coreclr,russellhadley/coreclr,ericeil/coreclr,cshung/coreclr,sagood/coreclr,manu-silicon/coreclr,geertdoornbos/coreclr,mokchhya/coreclr,krytarowski/coreclr,josteink/coreclr,fffej/coreclr,swgillespie/coreclr,krytarowski/coreclr,Godin/coreclr,schellap/coreclr,benpye/coreclr,bartonjs/coreclr,ktos/coreclr,yeaicc/coreclr,sjsinju/coreclr,zmaruo/coreclr,gitchomik/coreclr,shana/coreclr,mocsy/coreclr,serenabenny/coreclr,krixalis/coreclr,YongseopKim/coreclr,geertdoornbos/coreclr,tijoytom/coreclr,yizhang82/coreclr,iamjasonp/coreclr,sperling/coreclr,botaberg/coreclr,gkhanna79/coreclr,Sridhar-MS/coreclr,parjong/coreclr,neurospeech/coreclr,cmckinsey/coreclr,Dmitry-Me/coreclr,taylorjonl/coreclr,ktos/coreclr,mocsy/coreclr,SpotLabsNET/coreclr,josteink/coreclr,bjjones/coreclr,chuck-mitchell/coreclr,ZhichengZhu/coreclr,Dmitry-Me/coreclr,DasAllFolks/coreclr,lzcj4/coreclr,Lucrecious/coreclr,JosephTremoulet/coreclr,gitchomik/coreclr,swgillespie/coreclr,OryJuVog/coreclr,mmitche/coreclr,josteink/coreclr,orthoxerox/coreclr,poizan42/coreclr,dasMulli/coreclr,KrzysztofCwalina/coreclr,wkchoy74/coreclr,jamesqo/coreclr,James-Ko/coreclr,kyulee1/coreclr,chuck-mitchell/coreclr,krytarowski/coreclr,ZhichengZhu/coreclr,Sridhar-MS/coreclr,Godin/coreclr,matthubin/coreclr,James-Ko/coreclr,sejongoh/coreclr,pgavlin/coreclr,wkchoy74/coreclr,cmckinsey/coreclr,kyulee1/coreclr,apanda/coreclr,Djuffin/coreclr,josteink/coreclr,wateret/coreclr,kyulee1/coreclr,hanu412/coreclr,cshung/coreclr,shahid-pk/coreclr,grokys/coreclr,ragmani/coreclr,AlfredoMS/coreclr,cshung/coreclr,hseok-oh/coreclr,cmckinsey/coreclr,wtgodbe/coreclr,Samana/coreclr,krixalis/coreclr,chuck-mitchell/coreclr,Dmitry-Me/coreclr,naamunds/coreclr,wateret/coreclr,ktos/coreclr,bjjones/coreclr,josteink/coreclr,JonHanna/coreclr,jamesqo/coreclr,mmitche/coreclr,Godin/coreclr,ytechie/coreclr,OryJuVog/coreclr,mocsy/coreclr,gitchomik/coreclr,lzcj4/coreclr,ktos/coreclr,LLITCHEV/coreclr,lzcj4/coreclr,rartemev/coreclr,fffej/coreclr,hseok-oh/coreclr,dpodder/coreclr,alexperovich/coreclr,krk/coreclr,Godin/coreclr,jamesqo/coreclr,rartemev/coreclr,chaos7theory/coreclr,sejongoh/coreclr,ytechie/coreclr,cshung/coreclr,vinnyrom/coreclr,russellhadley/coreclr,GuilhermeSa/coreclr,ruben-ayrapetyan/coreclr,ramarag/coreclr,JosephTremoulet/coreclr,Samana/coreclr,xtypebee/coreclr,bitcrazed/coreclr,Lucrecious/coreclr,ktos/coreclr,josteink/coreclr,krytarowski/coreclr,stormleoxia/coreclr,ragmani/coreclr,ZhichengZhu/coreclr,xoofx/coreclr,chrishaly/coreclr,tijoytom/coreclr,gitchomik/coreclr,serenabenny/coreclr,wkchoy74/coreclr,grokys/coreclr,OryJuVog/coreclr,ytechie/coreclr,GuilhermeSa/coreclr,hseok-oh/coreclr,mokchhya/coreclr,stormleoxia/coreclr,James-Ko/coreclr,perfectphase/coreclr,KrzysztofCwalina/coreclr,orthoxerox/coreclr,SpotLabsNET/coreclr,AlfredoMS/coreclr,benpye/coreclr,cmckinsey/coreclr,chaos7theory/coreclr,serenabenny/coreclr,lzcj4/coreclr,OryJuVog/coreclr,bartonjs/coreclr,ganeshran/coreclr,MCGPPeters/coreclr,sagood/coreclr,xoofx/coreclr,ericeil/coreclr,wkchoy74/coreclr,mokchhya/coreclr,jamesqo/coreclr,manu-silicon/coreclr,mskvortsov/coreclr,JosephTremoulet/coreclr,stormleoxia/coreclr,ragmani/coreclr,Samana/coreclr,pgavlin/coreclr,benpye/coreclr,wateret/coreclr,grokys/coreclr,chaos7theory/coreclr,ytechie/coreclr,GuilhermeSa/coreclr,serenabenny/coreclr,naamunds/coreclr,blackdwarf/coreclr,yeaicc/coreclr,chrishaly/coreclr,naamunds/coreclr,xtypebee/coreclr,krk/coreclr,cmckinsey/coreclr,andschwa/coreclr,shana/coreclr,schellap/coreclr,poizan42/coreclr,geertdoornbos/coreclr,dpodder/coreclr,ruben-ayrapetyan/coreclr,krixalis/coreclr,Djuffin/coreclr,gkhanna79/coreclr,xtypebee/coreclr,russellhadley/coreclr,yeaicc/coreclr,krixalis/coreclr,orthoxerox/coreclr,xtypebee/coreclr,wtgodbe/coreclr,Djuffin/coreclr,blackdwarf/coreclr,ytechie/coreclr,andschwa/coreclr,MCGPPeters/coreclr,yizhang82/coreclr,shahid-pk/coreclr,vinnyrom/coreclr,ragmani/coreclr,LLITCHEV/coreclr,yizhang82/coreclr,pgavlin/coreclr,cydhaselton/coreclr,Djuffin/coreclr,taylorjonl/coreclr,wateret/coreclr,DasAllFolks/coreclr,taylorjonl/coreclr,apanda/coreclr,bartdesmet/coreclr,hseok-oh/coreclr,jhendrixMSFT/coreclr,perfectphase/coreclr,SlavaRa/coreclr,blackdwarf/coreclr,mmitche/coreclr,AlfredoMS/coreclr,sejongoh/coreclr,yizhang82/coreclr,sejongoh/coreclr,Dmitry-Me/coreclr,jhendrixMSFT/coreclr,mskvortsov/coreclr,jhendrixMSFT/coreclr,roncain/coreclr,JonHanna/coreclr,zmaruo/coreclr,Djuffin/coreclr,naamunds/coreclr,SpotLabsNET/coreclr,ramarag/coreclr,schellap/coreclr,ragmani/coreclr,shana/coreclr,ruben-ayrapetyan/coreclr,DasAllFolks/coreclr,vinnyrom/coreclr,perfectphase/coreclr,hanu412/coreclr,qiudesong/coreclr,orthoxerox/coreclr,chrishaly/coreclr,swgillespie/coreclr,russellhadley/coreclr,Godin/coreclr,zmaruo/coreclr,taylorjonl/coreclr,xoofx/coreclr,chaos7theory/coreclr,Dmitry-Me/coreclr,DasAllFolks/coreclr,Djuffin/coreclr,manu-silicon/coreclr,LLITCHEV/coreclr,DasAllFolks/coreclr,GuilhermeSa/coreclr,SlavaRa/coreclr,AlexGhiondea/coreclr,roncain/coreclr,botaberg/coreclr,wateret/coreclr,sperling/coreclr,mskvortsov/coreclr,ramarag/coreclr,blackdwarf/coreclr,sejongoh/coreclr,dasMulli/coreclr,manu-silicon/coreclr,zmaruo/coreclr,mskvortsov/coreclr,JonHanna/coreclr,jhendrixMSFT/coreclr,chaos7theory/coreclr,jhendrixMSFT/coreclr,chrishaly/coreclr,ramarag/coreclr,rartemev/coreclr,Samana/coreclr,poizan42/coreclr,YongseopKim/coreclr,AlexGhiondea/coreclr,matthubin/coreclr,mokchhya/coreclr,matthubin/coreclr,bitcrazed/coreclr,mskvortsov/coreclr,grokys/coreclr,DasAllFolks/coreclr,Lucrecious/coreclr,chuck-mitchell/coreclr,rartemev/coreclr,Sridhar-MS/coreclr,gkhanna79/coreclr,bitcrazed/coreclr,dasMulli/coreclr,AlfredoMS/coreclr,roncain/coreclr,josteink/coreclr,Alcaro/coreclr,cydhaselton/coreclr,bartdesmet/coreclr,sagood/coreclr,yizhang82/coreclr,mocsy/coreclr,dpodder/coreclr,JonHanna/coreclr,cydhaselton/coreclr,naamunds/coreclr,bjjones/coreclr,neurospeech/coreclr,bjjones/coreclr,shahid-pk/coreclr,krytarowski/coreclr,rartemev/coreclr,orthoxerox/coreclr,krixalis/coreclr,sjsinju/coreclr,cydhaselton/coreclr,krk/coreclr,xtypebee/coreclr,GuilhermeSa/coreclr,sjsinju/coreclr,bitcrazed/coreclr,YongseopKim/coreclr,botaberg/coreclr,ktos/coreclr,ZhichengZhu/coreclr,YongseopKim/coreclr,shahid-pk/coreclr,kyulee1/coreclr,neurospeech/coreclr,schellap/coreclr,lzcj4/coreclr,shana/coreclr,swgillespie/coreclr,ericeil/coreclr,xoofx/coreclr,hanu412/coreclr,iamjasonp/coreclr,hanu412/coreclr,bitcrazed/coreclr,poizan42/coreclr,botaberg/coreclr,KrzysztofCwalina/coreclr,sjsinju/coreclr,sjsinju/coreclr,geertdoornbos/coreclr,ruben-ayrapetyan/coreclr,martinwoodward/coreclr,SpotLabsNET/coreclr,gkhanna79/coreclr,swgillespie/coreclr,ZhichengZhu/coreclr,naamunds/coreclr,matthubin/coreclr,KrzysztofCwalina/coreclr,jamesqo/coreclr,poizan42/coreclr,neurospeech/coreclr,krk/coreclr,cydhaselton/coreclr,qiudesong/coreclr,xoofx/coreclr,taylorjonl/coreclr,sejongoh/coreclr,sperling/coreclr,perfectphase/coreclr,schellap/coreclr,OryJuVog/coreclr,bartdesmet/coreclr,perfectphase/coreclr,Alcaro/coreclr,cshung/coreclr,chrishaly/coreclr,alexperovich/coreclr,ericeil/coreclr,martinwoodward/coreclr,Samana/coreclr,YongseopKim/coreclr,gkhanna79/coreclr,tijoytom/coreclr,JonHanna/coreclr,bartonjs/coreclr,perfectphase/coreclr,AlexGhiondea/coreclr,mmitche/coreclr,jamesqo/coreclr,mskvortsov/coreclr,stormleoxia/coreclr,zmaruo/coreclr,wtgodbe/coreclr,botaberg/coreclr,roncain/coreclr,hanu412/coreclr,bartdesmet/coreclr,parjong/coreclr,iamjasonp/coreclr,shana/coreclr,ganeshran/coreclr,alexperovich/coreclr,orthoxerox/coreclr,qiudesong/coreclr,cmckinsey/coreclr,chuck-mitchell/coreclr,James-Ko/coreclr,ganeshran/coreclr,martinwoodward/coreclr,Sridhar-MS/coreclr,martinwoodward/coreclr,blackdwarf/coreclr,bartonjs/coreclr,fffej/coreclr,shahid-pk/coreclr,pgavlin/coreclr,swgillespie/coreclr,dkorolev/coreclr,mocsy/coreclr,grokys/coreclr,apanda/coreclr,Lucrecious/coreclr,Dmitry-Me/coreclr,hanu412/coreclr,dasMulli/coreclr,blackdwarf/coreclr,andschwa/coreclr,cmckinsey/coreclr,mokchhya/coreclr,taylorjonl/coreclr,ZhichengZhu/coreclr,ragmani/coreclr,hseok-oh/coreclr,JosephTremoulet/coreclr,botaberg/coreclr,manu-silicon/coreclr,apanda/coreclr,sagood/coreclr,vinnyrom/coreclr,manu-silicon/coreclr,yeaicc/coreclr,sperling/coreclr,chuck-mitchell/coreclr,jhendrixMSFT/coreclr,dkorolev/coreclr,Dmitry-Me/coreclr,ericeil/coreclr,dkorolev/coreclr,stormleoxia/coreclr,serenabenny/coreclr,Lucrecious/coreclr,serenabenny/coreclr,andschwa/coreclr,swgillespie/coreclr,andschwa/coreclr,Lucrecious/coreclr,pgavlin/coreclr,sagood/coreclr,roncain/coreclr,bartdesmet/coreclr,LLITCHEV/coreclr,apanda/coreclr,AlfredoMS/coreclr,SlavaRa/coreclr,wtgodbe/coreclr,sperling/coreclr,martinwoodward/coreclr,grokys/coreclr,SpotLabsNET/coreclr,roncain/coreclr,dpodder/coreclr,sagood/coreclr,iamjasonp/coreclr,Samana/coreclr,James-Ko/coreclr,alexperovich/coreclr,gkhanna79/coreclr,sejongoh/coreclr,bitcrazed/coreclr,cshung/coreclr,dasMulli/coreclr,wtgodbe/coreclr,qiudesong/coreclr,dpodder/coreclr,schellap/coreclr,KrzysztofCwalina/coreclr,neurospeech/coreclr,krytarowski/coreclr,yizhang82/coreclr,geertdoornbos/coreclr,fffej/coreclr,bartonjs/coreclr,benpye/coreclr,JosephTremoulet/coreclr,matthubin/coreclr,gitchomik/coreclr,vinnyrom/coreclr,ganeshran/coreclr,alexperovich/coreclr,chuck-mitchell/coreclr,naamunds/coreclr,geertdoornbos/coreclr,wkchoy74/coreclr,qiudesong/coreclr,krk/coreclr,wkchoy74/coreclr,ytechie/coreclr,xoofx/coreclr,parjong/coreclr,ramarag/coreclr,dkorolev/coreclr,wateret/coreclr,AlfredoMS/coreclr,ericeil/coreclr,mmitche/coreclr,zmaruo/coreclr,dasMulli/coreclr,yeaicc/coreclr,geertdoornbos/coreclr,tijoytom/coreclr,kyulee1/coreclr,ZhichengZhu/coreclr,russellhadley/coreclr,ruben-ayrapetyan/coreclr,roncain/coreclr,cydhaselton/coreclr,ramarag/coreclr,parjong/coreclr,LLITCHEV/coreclr,chaos7theory/coreclr,KrzysztofCwalina/coreclr,taylorjonl/coreclr,fffej/coreclr,stormleoxia/coreclr,krixalis/coreclr,martinwoodward/coreclr,Sridhar-MS/coreclr,poizan42/coreclr,ruben-ayrapetyan/coreclr,MCGPPeters/coreclr,bartdesmet/coreclr,MCGPPeters/coreclr,bartonjs/coreclr,shana/coreclr,hseok-oh/coreclr,chrishaly/coreclr,SlavaRa/coreclr,JonHanna/coreclr,James-Ko/coreclr,stormleoxia/coreclr,sperling/coreclr,iamjasonp/coreclr,xtypebee/coreclr,yeaicc/coreclr,dkorolev/coreclr,Alcaro/coreclr,andschwa/coreclr,benpye/coreclr,AlexGhiondea/coreclr,mocsy/coreclr,Sridhar-MS/coreclr,wtgodbe/coreclr,tijoytom/coreclr,JosephTremoulet/coreclr,SpotLabsNET/coreclr,sperling/coreclr,shahid-pk/coreclr,bitcrazed/coreclr,qiudesong/coreclr,OryJuVog/coreclr,ramarag/coreclr,ktos/coreclr,ganeshran/coreclr,iamjasonp/coreclr,Alcaro/coreclr,parjong/coreclr,sjsinju/coreclr,rartemev/coreclr,schellap/coreclr,alexperovich/coreclr,Godin/coreclr,apanda/coreclr,mmitche/coreclr,wkchoy74/coreclr,parjong/coreclr,blackdwarf/coreclr,andschwa/coreclr,fffej/coreclr,jhendrixMSFT/coreclr,bjjones/coreclr,dasMulli/coreclr,shahid-pk/coreclr,dpodder/coreclr,bartdesmet/coreclr,benpye/coreclr,LLITCHEV/coreclr,KrzysztofCwalina/coreclr,AlexGhiondea/coreclr,dkorolev/coreclr,benpye/coreclr,SlavaRa/coreclr,mocsy/coreclr,lzcj4/coreclr,SlavaRa/coreclr,tijoytom/coreclr,pgavlin/coreclr,MCGPPeters/coreclr,kyulee1/coreclr,AlexGhiondea/coreclr,LLITCHEV/coreclr,Alcaro/coreclr,bjjones/coreclr,bartonjs/coreclr,krk/coreclr,Alcaro/coreclr,Lucrecious/coreclr