switch compliler flags to prevent AR fail on ARM
switch compliler flags to prevent AR fail on ARM

sej7278/Arduino-Makefile,marioaugustorama/Arduino-Makefile,sudar/Arduino-Makefile,tuna-f1sh/Arduino-Makefile,sej7278/Arduino-Makefile,tuna-f1sh/Arduino-Makefile,sudar/Arduino-Makefile,marioaugustorama/Arduino-Makefile