esp8266: Add "erase" target to Makefile, to erase entire flash.
esp8266: Add "erase" target to Makefile, to erase entire flash.

blazewicz/micropython,micropython/micropython-esp32,adafruit/circuitpython,Timmenem/micropython,adafruit/circuitpython,HenrikSolver/micropython,tobbad/micropython,adafruit/circuitpython,hiway/micropython,MrSurly/micropython,pozetroninc/micropython,selste/micropython,trezor/micropython,mhoffma/micropython,bvernoux/micropython,henriknelson/micropython,adafruit/micropython,selste/micropython,micropython/micropython-esp32,selste/micropython,bvernoux/micropython,toolmacher/micropython,HenrikSolver/micropython,kerneltask/micropython,toolmacher/micropython,swegener/micropython,adafruit/micropython,MrSurly/micropython,kerneltask/micropython,hiway/micropython,AriZuu/micropython,trezor/micropython,swegener/micropython,tuc-osg/micropython,henriknelson/micropython,SHA2017-badge/micropython-esp32,henriknelson/micropython,ryannathans/micropython,Timmenem/micropython,henriknelson/micropython,pfalcon/micropython,MrSurly/micropython,kerneltask/micropython,tuc-osg/micropython,kerneltask/micropython,deshipu/micropython,torwag/micropython,dmazzella/micropython,adafruit/micropython,chrisdearman/micropython,henriknelson/micropython,oopy/micropython,infinnovation/micropython,Timmenem/micropython,TDAbboud/micropython,SHA2017-badge/micropython-esp32,tralamazza/micropython,Peetz0r/micropython-esp32,pozetroninc/micropython,pozetroninc/micropython,pfalcon/micropython,swegener/micropython,puuu/micropython,torwag/micropython,MrSurly/micropython-esp32,ryannathans/micropython,MrSurly/micropython-esp32,torwag/micropython,cwyark/micropython,bvernoux/micropython,alex-robbins/micropython,PappaPeppar/micropython,PappaPeppar/micropython,Timmenem/micropython,Peetz0r/micropython-esp32,lowRISC/micropython,blazewicz/micropython,mhoffma/micropython,torwag/micropython,cwyark/micropython,infinnovation/micropython,tuc-osg/micropython,blazewicz/micropython,mhoffma/micropython,Timmenem/micropython,ryannathans/micropython,toolmacher/micropython,infinnovation/micropython,dmazzella/micropython,tobbad/micropython,TDAbboud/micropython,MrSurly/micropython,chrisdearman/micropython,pramasoul/micropython,swegener/micropython,trezor/micropython,SHA2017-badge/micropython-esp32,lowRISC/micropython,oopy/micropython,HenrikSolver/micropython,chrisdearman/micropython,tralamazza/micropython,pramasoul/micropython,trezor/micropython,pramasoul/micropython,TDAbboud/micropython,puuu/micropython,pfalcon/micropython,alex-robbins/micropython,tobbad/micropython,MrSurly/micropython,MrSurly/micropython-esp32,blazewicz/micropython,lowRISC/micropython,chrisdearman/micropython,mhoffma/micropython,blazewicz/micropython,PappaPeppar/micropython,AriZuu/micropython,lowRISC/micropython,micropython/micropython-esp32,adafruit/circuitpython,MrSurly/micropython-esp32,trezor/micropython,hiway/micropython,selste/micropython,micropython/micropython-esp32,kerneltask/micropython,oopy/micropython,cwyark/micropython,adafruit/circuitpython,AriZuu/micropython,pozetroninc/micropython,dmazzella/micropython,dmazzella/micropython,selste/micropython,pfalcon/micropython,infinnovation/micropython,torwag/micropython,HenrikSolver/micropython,puuu/micropython,Peetz0r/micropython-esp32,SHA2017-badge/micropython-esp32,deshipu/micropython,pfalcon/micropython,deshipu/micropython,hiway/micropython,PappaPeppar/micropython,TDAbboud/micropython,bvernoux/micropython,pozetroninc/micropython,ryannathans/micropython,AriZuu/micropython,alex-robbins/micropython,alex-robbins/micropython,tobbad/micropython,cwyark/micropython,hiway/micropython,ryannathans/micropython,infinnovation/micropython,adafruit/circuitpython,swegener/micropython,TDAbboud/micropython,deshipu/micropython,toolmacher/micropython,mhoffma/micropython,PappaPeppar/micropython,Peetz0r/micropython-esp32,puuu/micropython,tuc-osg/micropython,SHA2017-badge/micropython-esp32,lowRISC/micropython,oopy/micropython,pramasoul/micropython,cwyark/micropython,Peetz0r/micropython-esp32,tobbad/micropython,tralamazza/micropython,MrSurly/micropython-esp32,bvernoux/micropython,pramasoul/micropython,alex-robbins/micropython,tuc-osg/micropython,HenrikSolver/micropython,adafruit/micropython,toolmacher/micropython,tralamazza/micropython,micropython/micropython-esp32,chrisdearman/micropython,AriZuu/micropython,puuu/micropython,oopy/micropython,deshipu/micropython,adafruit/micropython