Update unix-instructions.md
Update unix-instructions.md
wtgodbe/corefx,shimingsg/corefx,wtgodbe/corefx,shimingsg/corefx,ViktorHofer/corefx,ericstj/corefx,ericstj/corefx,shimingsg/corefx,ViktorHofer/corefx,ericstj/corefx,ericstj/corefx,ericstj/corefx,ViktorHofer/corefx,wtgodbe/corefx,wtgodbe/corefx,ViktorHofer/corefx,ViktorHofer/corefx,ericstj/corefx,wtgodbe/corefx,shimingsg/corefx,ViktorHofer/corefx,wtgodbe/corefx,shimingsg/corefx,ViktorHofer/corefx,wtgodbe/corefx,shimingsg/corefx,shimingsg/corefx,ericstj/corefx