unix: Add CFLAGS_EXTRA & LDFLAGS_EXTRA for command line usage.
unix: Add CFLAGS_EXTRA & LDFLAGS_EXTRA for command line usage.

The idea is that it should be possible to pass any additional params for
experimentation without need to patch sources (and without need to deviate
from or repeat baseline options).

mhoffma/micropython,KISSMonX/micropython,ericsnowcurrently/micropython,ahotam/micropython,mhoffma/micropython,ryannathans/micropython,chrisdearman/micropython,mgyenik/micropython,ganshun666/micropython,utopiaprince/micropython,xyb/micropython,noahchense/micropython,misterdanb/micropython,heisewangluo/micropython,MrSurly/micropython,tobbad/micropython,turbinenreiter/micropython,slzatz/micropython,tdautc19841202/micropython,supergis/micropython,redbear/micropython,orionrobots/micropython,cloudformdesign/micropython,adafruit/micropython,tralamazza/micropython,SHA2017-badge/micropython-esp32,neilh10/micropython,swegener/micropython,heisewangluo/micropython,skybird6672/micropython,kerneltask/micropython,tobbad/micropython,selste/micropython,bvernoux/micropython,micropython/micropython-esp32,MrSurly/micropython,ahotam/micropython,blazewicz/micropython,alex-robbins/micropython,chrisdearman/micropython,alex-march/micropython,lowRISC/micropython,noahwilliamsson/micropython,adafruit/circuitpython,oopy/micropython,danicampora/micropython,adafruit/micropython,noahwilliamsson/micropython,blazewicz/micropython,mpalomer/micropython,jimkmc/micropython,adamkh/micropython,adafruit/micropython,hosaka/micropython,dmazzella/micropython,skybird6672/micropython,ceramos/micropython,bvernoux/micropython,SungEun-Steve-Kim/test-mp,infinnovation/micropython,trezor/micropython,EcmaXp/micropython,vitiral/micropython,ryannathans/micropython,swegener/micropython,stonegithubs/micropython,mhoffma/micropython,ceramos/micropython,blmorris/micropython,jlillest/micropython,TDAbboud/micropython,hosaka/micropython,dxxb/micropython,xyb/micropython,AriZuu/micropython,pfalcon/micropython,micropython/micropython-esp32,toolmacher/micropython,emfcamp/micropython,omtinez/micropython,hiway/micropython,methoxid/micropystat,kerneltask/micropython,vriera/micropython,tobbad/micropython,xyb/micropython,alex-march/micropython,Peetz0r/micropython-esp32,Peetz0r/micropython-esp32,jimkmc/micropython,firstval/micropython,swegener/micropython,toolmacher/micropython,turbinenreiter/micropython,paul-xxx/micropython,pozetroninc/micropython,ernesto-g/micropython,matthewelse/micropython,redbear/micropython,kerneltask/micropython,galenhz/micropython,danicampora/micropython,emfcamp/micropython,TDAbboud/micropython,warner83/micropython,TDAbboud/micropython,lbattraw/micropython,Peetz0r/micropython-esp32,ryannathans/micropython,cnoviello/micropython,EcmaXp/micropython,aethaniel/micropython,rubencabrera/micropython,paul-xxx/micropython,henriknelson/micropython,blmorris/micropython,tdautc19841202/micropython,cwyark/micropython,jmarcelino/pycom-micropython,cwyark/micropython,Timmenem/micropython,galenhz/micropython,pramasoul/micropython,praemdonck/micropython,vitiral/micropython,jmarcelino/pycom-micropython,misterdanb/micropython,toolmacher/micropython,hosaka/micropython,ceramos/micropython,xhat/micropython,MrSurly/micropython-esp32,aethaniel/micropython,paul-xxx/micropython,skybird6672/micropython,Timmenem/micropython,EcmaXp/micropython,aethaniel/micropython,toolmacher/micropython,henriknelson/micropython,alex-march/micropython,ruffy91/micropython,lowRISC/micropython,suda/micropython,mgyenik/micropython,SHA2017-badge/micropython-esp32,lowRISC/micropython,tdautc19841202/micropython,cnoviello/micropython,xhat/micropython,mgyenik/micropython,praemdonck/micropython,hosaka/micropython,jlillest/micropython,supergis/micropython,PappaPeppar/micropython,emfcamp/micropython,tralamazza/micropython,feilongfl/micropython,MrSurly/micropython,jimkmc/micropython,xyb/micropython,slzatz/micropython,blmorris/micropython,misterdanb/micropython,heisewangluo/micropython,deshipu/micropython,stonegithubs/micropython,ChuckM/micropython,cloudformdesign/micropython,Timmenem/micropython,mpalomer/micropython,emfcamp/micropython,kostyll/micropython,jlillest/micropython,methoxid/micropystat,omtinez/micropython,ChuckM/micropython,selste/micropython,ganshun666/micropython,lbattraw/micropython,dinau/micropython,bvernoux/micropython,Timmenem/micropython,supergis/micropython,martinribelotta/micropython,AriZuu/micropython,warner83/micropython,methoxid/micropystat,alex-robbins/micropython,matthewelse/micropython,lbattraw/micropython,orionrobots/micropython,orionrobots/micropython,ChuckM/micropython,matthewelse/micropython,ericsnowcurrently/micropython,praemdonck/micropython,suda/micropython,noahchense/micropython,xhat/micropython,feilongfl/micropython,hiway/micropython,SungEun-Steve-Kim/test-mp,KISSMonX/micropython,rubencabrera/micropython,danicampora/micropython,neilh10/micropython,praemdonck/micropython,hosaka/micropython,mianos/micropython,omtinez/micropython,noahchense/micropython,dinau/micropython,chrisdearman/micropython,drrk/micropython,PappaPeppar/micropython,martinribelotta/micropython,puuu/micropython,vitiral/micropython,turbinenreiter/micropython,mpalomer/micropython,utopiaprince/micropython,ericsnowcurrently/micropython,tobbad/micropython,trezor/micropython,alex-robbins/micropython,ahotam/micropython,xuxiaoxin/micropython,trezor/micropython,omtinez/micropython,adamkh/micropython,vriera/micropython,kerneltask/micropython,PappaPeppar/micropython,ganshun666/micropython,SungEun-Steve-Kim/test-mp,jmarcelino/pycom-micropython,infinnovation/micropython,adafruit/circuitpython,ahotam/micropython,TDAbboud/micropython,ChuckM/micropython,paul-xxx/micropython,HenrikSolver/micropython,HenrikSolver/micropython,utopiaprince/micropython,paul-xxx/micropython,toolmacher/micropython,warner83/micropython,AriZuu/micropython,emfcamp/micropython,matthewelse/micropython,misterdanb/micropython,cwyark/micropython,xuxiaoxin/micropython,torwag/micropython,turbinenreiter/micropython,micropython/micropython-esp32,adafruit/micropython,utopiaprince/micropython,tralamazza/micropython,jlillest/micropython,blazewicz/micropython,xyb/micropython,tobbad/micropython,deshipu/micropython,kerneltask/micropython,firstval/micropython,alex-robbins/micropython,lowRISC/micropython,neilh10/micropython,noahwilliamsson/micropython,MrSurly/micropython-esp32,Vogtinator/micropython,cloudformdesign/micropython,feilongfl/micropython,Timmenem/micropython,ceramos/micropython,dmazzella/micropython,slzatz/micropython,suda/micropython,oopy/micropython,pozetroninc/micropython,adamkh/micropython,xhat/micropython,ganshun666/micropython,ryannathans/micropython,HenrikSolver/micropython,deshipu/micropython,lbattraw/micropython,EcmaXp/micropython,redbear/micropython,cwyark/micropython,xuxiaoxin/micropython,feilongfl/micropython,torwag/micropython,tdautc19841202/micropython,tuc-osg/micropython,tdautc19841202/micropython,omtinez/micropython,redbear/micropython,pramasoul/micropython,oopy/micropython,puuu/micropython,ryannathans/micropython,mianos/micropython,KISSMonX/micropython,bvernoux/micropython,mgyenik/micropython,aethaniel/micropython,AriZuu/micropython,selste/micropython,hiway/micropython,alex-march/micropython,EcmaXp/micropython,dxxb/micropython,henriknelson/micropython,firstval/micropython,Vogtinator/micropython,dxxb/micropython,hiway/micropython,heisewangluo/micropython,henriknelson/micropython,martinribelotta/micropython,stonegithubs/micropython,MrSurly/micropython,ernesto-g/micropython,HenrikSolver/micropython,stonegithubs/micropython,dinau/micropython,kostyll/micropython,SungEun-Steve-Kim/test-mp,firstval/micropython,PappaPeppar/micropython,mgyenik/micropython,alex-march/micropython,tuc-osg/micropython,drrk/micropython,stonegithubs/micropython,matthewelse/micropython,micropython/micropython-esp32,orionrobots/micropython,torwag/micropython,jimkmc/micropython,dhylands/micropython,neilh10/micropython,ChuckM/micropython,orionrobots/micropython,martinribelotta/micropython,vriera/micropython,puuu/micropython,methoxid/micropystat,dxxb/micropython,redbear/micropython,ruffy91/micropython,jmarcelino/pycom-micropython,utopiaprince/micropython,ernesto-g/micropython,adafruit/circuitpython,bvernoux/micropython,vitiral/micropython,ruffy91/micropython,neilh10/micropython,rubencabrera/micropython,dinau/micropython,ruffy91/micropython,firstval/micropython,cnoviello/micropython,swegener/micropython,oopy/micropython,drrk/micropython,SHA2017-badge/micropython-esp32,MrSurly/micropython,SungEun-Steve-Kim/test-mp,lbattraw/micropython,dmazzella/micropython,SHA2017-badge/micropython-esp32,skybird6672/micropython,pfalcon/micropython,turbinenreiter/micropython,ernesto-g/micropython,supergis/micropython,martinribelotta/micropython,kostyll/micropython,infinnovation/micropython,henriknelson/micropython,jlillest/micropython,mpalomer/micropython,heisewangluo/micropython,PappaPeppar/micropython,adamkh/micropython,puuu/micropython,praemdonck/micropython,oopy/micropython,blazewicz/micropython,kostyll/micropython,dhylands/micropython,misterdanb/micropython,cloudformdesign/micropython,dxxb/micropython,selste/micropython,MrSurly/micropython-esp32,supergis/micropython,ernesto-g/micropython,pfalcon/micropython,deshipu/micropython,matthewelse/micropython,pramasoul/micropython,adafruit/circuitpython,ericsnowcurrently/micropython,vriera/micropython,noahchense/micropython,HenrikSolver/micropython,vriera/micropython,warner83/micropython,xuxiaoxin/micropython,Peetz0r/micropython-esp32,feilongfl/micropython,rubencabrera/micropython,ganshun666/micropython,pozetroninc/micropython,galenhz/micropython,adafruit/micropython,pramasoul/micropython,MrSurly/micropython-esp32,AriZuu/micropython,pozetroninc/micropython,Peetz0r/micropython-esp32,selste/micropython,blazewicz/micropython,noahwilliamsson/micropython,xuxiaoxin/micropython,infinnovation/micropython,chrisdearman/micropython,mianos/micropython,warner83/micropython,tuc-osg/micropython,puuu/micropython,galenhz/micropython,ceramos/micropython,tuc-osg/micropython,jmarcelino/pycom-micropython,torwag/micropython,mhoffma/micropython,slzatz/micropython,blmorris/micropython,adafruit/circuitpython,mianos/micropython,danicampora/micropython,ruffy91/micropython,tralamazza/micropython,cloudformdesign/micropython,mianos/micropython,dmazzella/micropython,dinau/micropython,pfalcon/micropython,ahotam/micropython,trezor/micropython,suda/micropython,blmorris/micropython,noahchense/micropython,danicampora/micropython,dhylands/micropython,deshipu/micropython,galenhz/micropython,rubencabrera/micropython,trezor/micropython,hiway/micropython,skybird6672/micropython,pozetroninc/micropython,tuc-osg/micropython,alex-robbins/micropython,dhylands/micropython,lowRISC/micropython,infinnovation/micropython,swegener/micropython,cnoviello/micropython,SHA2017-badge/micropython-esp32,KISSMonX/micropython,adafruit/circuitpython,aethaniel/micropython,methoxid/micropystat,cwyark/micropython,jimkmc/micropython,KISSMonX/micropython,cnoviello/micropython,Vogtinator/micropython,pramasoul/micropython,micropython/micropython-esp32,MrSurly/micropython-esp32,dhylands/micropython,chrisdearman/micropython,Vogtinator/micropython,drrk/micropython,mpalomer/micropython,TDAbboud/micropython,noahwilliamsson/micropython,xhat/micropython,drrk/micropython,mhoffma/micropython,adamkh/micropython,Vogtinator/micropython,slzatz/micropython,ericsnowcurrently/micropython,suda/micropython,pfalcon/micropython,torwag/micropython,vitiral/micropython,kostyll/micropython