Switch back to more performant and portable Marvin implementation
Switch back to more performant and portable Marvin implementation

Signed-off-by: dotnet-bot <03c4cb6107ae99956a7681f2c97ff7104809a2bd@microsoft.com>
Signed-off-by: dotnet-bot-corefx-mirror <03c4cb6107ae99956a7681f2c97ff7104809a2bd@microsoft.com>

ViktorHofer/corefx,ptoonen/corefx,Jiayili1/corefx,ViktorHofer/corefx,Jiayili1/corefx,Jiayili1/corefx,BrennanConroy/corefx,ViktorHofer/corefx,ptoonen/corefx,mmitche/corefx,wtgodbe/corefx,mmitche/corefx,shimingsg/corefx,Jiayili1/corefx,wtgodbe/corefx,ViktorHofer/corefx,wtgodbe/corefx,mmitche/corefx,ericstj/corefx,BrennanConroy/corefx,ericstj/corefx,ptoonen/corefx,mmitche/corefx,ericstj/corefx,shimingsg/corefx,ViktorHofer/corefx,wtgodbe/corefx,wtgodbe/corefx,shimingsg/corefx,Jiayili1/corefx,ViktorHofer/corefx,ptoonen/corefx,ericstj/corefx,mmitche/corefx,shimingsg/corefx,ptoonen/corefx,ptoonen/corefx,ViktorHofer/corefx,ericstj/corefx,BrennanConroy/corefx,ptoonen/corefx,wtgodbe/corefx,mmitche/corefx,shimingsg/corefx,ericstj/corefx,wtgodbe/corefx,Jiayili1/corefx,mmitche/corefx,shimingsg/corefx,Jiayili1/corefx,shimingsg/corefx,ericstj/corefx