Updated the README.md
Updated the README.md

Added instructions for building on a non-RPi device.
emerrepengo/recalbox-emulationstation,hevey/EmulationStation,cavedude00/EmulationStation,digitalLumberjack/recalbox-emulationstation,tbhova/EmulationStation,pimcgcd/esmod,Krejza9/EmulationStation-sdlmixer,larrykoubiak/EmulationStation,hdo/jukeboxV3FrontEnd,hdo/jukeboxV3FrontEnd,larrykoubiak/EmulationStation,jrassa/EmulationStation,Black3v3r/EmulationStation,pimcgcd/esmod,hdo/EmulationStation,cuhsat/EmulationStation,pmoran13800/recalbox-emulationstation,Herdinger/EmulationStation,digitalLumberjack/recalbox-emulationstation,dimistor/EmulationStation,hdo/EmulationStation,jgeumlek/EmulationStation-tweaked,emerrepengo/recalbox-emulationstation,cuhsat/EmulationStation,joolswills/EmulationStation,emerrepengo/recalbox-emulationstation,mgoulartBR/retrobox-emulationstation,recalbox/recalbox-emulationstation,Spicykiwi/EmulationStation,igungor/recalbox-emulationstation,joolswills/EmulationStation,asmorgan24/EmulationStation-Marketplace,pmoran13800/recalbox-emulationstation,hevey/EmulationStation,hdo/jukeboxV3FrontEnd,tschires/emu,recalbox/recalbox-emulationstation,Black3v3r/EmulationStation,rjklawiter/ESpro,Herdinger/EmulationStation,larrykoubiak/EmulationStation,asmorgan24/EmulationStation-Marketplace,rockaddicted/recalbox-emulationstation,dimistor/EmulationStation,mgoulartBR/retrobox-emulationstation,tbhova/EmulationStation,rockaddicted/recalbox-emulationstation,pimcgcd/esmod,Black3v3r/EmulationStation,sdt/EmulationStation,zigurana/EmulationStation,jrassa/EmulationStation,rjklawiter/ESpro,Herdinger/EmulationStation,gr33k/EmulationStation,zigurana/EmulationStation,jgeumlek/EmulationStation-tweaked,MisterTea/EmulationStation,RobLoach/EmulationStation,RobLoach/EmulationStation,Spicykiwi/EmulationStation,Krejza9/EmulationStation-sdlmixer,tbhova/EmulationStation,Spicykiwi/EmulationStation,mgoulartBR/retrobox-emulationstation,cavedude00/EmulationStation,Krejza9/EmulationStation-sdlmixer,pmoran13800/recalbox-emulationstation,sdt/EmulationStation,joolswills/EmulationStation,gr33k/EmulationStation,tschires/emu,rockaddicted/recalbox-emulationstation,igungor/recalbox-emulationstation,jgeumlek/EmulationStation-tweaked,tschires/emu,MisterTea/EmulationStation,dimistor/EmulationStation,gr33k/EmulationStation,zigurana/EmulationStation,hevey/EmulationStation,digitalLumberjack/recalbox-emulationstation,asmorgan24/EmulationStation-Marketplace,joolswills/EmulationStation,cavedude00/EmulationStation,cuhsat/EmulationStation,jrassa/EmulationStation,jrassa/EmulationStation,RobLoach/EmulationStation,MisterTea/EmulationStation,rjklawiter/ESpro,hdo/EmulationStation,igungor/recalbox-emulationstation,sdt/EmulationStation,asmorgan24/EmulationStation-Marketplace,recalbox/recalbox-emulationstation