py/mpconfig.h: Allow to build without alloca() for ANSI C compliance.
py/mpconfig.h: Allow to build without alloca() for ANSI C compliance.

Define MICROPY_NO_ALLOCA=1 and memory will be allocated from heap instead
and freed by garbage collection.

PappaPeppar/micropython,adafruit/micropython,dmazzella/micropython,galenhz/micropython,dmazzella/micropython,HenrikSolver/micropython,PappaPeppar/micropython,ganshun666/micropython,praemdonck/micropython,ernesto-g/micropython,MrSurly/micropython-esp32,ruffy91/micropython,alex-march/micropython,tobbad/micropython,MrSurly/micropython,danicampora/micropython,drrk/micropython,pozetroninc/micropython,Peetz0r/micropython-esp32,kerneltask/micropython,praemdonck/micropython,adamkh/micropython,lowRISC/micropython,torwag/micropython,redbear/micropython,EcmaXp/micropython,xhat/micropython,turbinenreiter/micropython,mianos/micropython,misterdanb/micropython,alex-march/micropython,blazewicz/micropython,praemdonck/micropython,chrisdearman/micropython,ganshun666/micropython,selste/micropython,galenhz/micropython,chrisdearman/micropython,Timmenem/micropython,supergis/micropython,ryannathans/micropython,PappaPeppar/micropython,danicampora/micropython,tralamazza/micropython,adamkh/micropython,redbear/micropython,jmarcelino/pycom-micropython,adafruit/circuitpython,ernesto-g/micropython,bvernoux/micropython,mianos/micropython,micropython/micropython-esp32,swegener/micropython,deshipu/micropython,Peetz0r/micropython-esp32,EcmaXp/micropython,supergis/micropython,trezor/micropython,tralamazza/micropython,emfcamp/micropython,deshipu/micropython,SHA2017-badge/micropython-esp32,martinribelotta/micropython,praemdonck/micropython,xhat/micropython,toolmacher/micropython,torwag/micropython,alex-robbins/micropython,micropython/micropython-esp32,ganshun666/micropython,puuu/micropython,puuu/micropython,blazewicz/micropython,chrisdearman/micropython,hiway/micropython,blmorris/micropython,micropython/micropython-esp32,blmorris/micropython,SHA2017-badge/micropython-esp32,toolmacher/micropython,ganshun666/micropython,matthewelse/micropython,bvernoux/micropython,martinribelotta/micropython,oopy/micropython,adafruit/micropython,bvernoux/micropython,lowRISC/micropython,AriZuu/micropython,pramasoul/micropython,drrk/micropython,jmarcelino/pycom-micropython,oopy/micropython,deshipu/micropython,galenhz/micropython,pozetroninc/micropython,mhoffma/micropython,selste/micropython,turbinenreiter/micropython,galenhz/micropython,mhoffma/micropython,pramasoul/micropython,praemdonck/micropython,swegener/micropython,adafruit/circuitpython,AriZuu/micropython,mhoffma/micropython,neilh10/micropython,hosaka/micropython,trezor/micropython,redbear/micropython,jmarcelino/pycom-micropython,alex-march/micropython,henriknelson/micropython,hiway/micropython,danicampora/micropython,puuu/micropython,henriknelson/micropython,turbinenreiter/micropython,cwyark/micropython,blmorris/micropython,toolmacher/micropython,xhat/micropython,emfcamp/micropython,hiway/micropython,kerneltask/micropython,emfcamp/micropython,misterdanb/micropython,tuc-osg/micropython,ryannathans/micropython,pfalcon/micropython,adafruit/circuitpython,TDAbboud/micropython,hosaka/micropython,mpalomer/micropython,dinau/micropython,redbear/micropython,pramasoul/micropython,AriZuu/micropython,dinau/micropython,turbinenreiter/micropython,dinau/micropython,chrisdearman/micropython,mianos/micropython,neilh10/micropython,misterdanb/micropython,blazewicz/micropython,cwyark/micropython,TDAbboud/micropython,Timmenem/micropython,matthewelse/micropython,tuc-osg/micropython,micropython/micropython-esp32,pfalcon/micropython,MrSurly/micropython,pozetroninc/micropython,neilh10/micropython,xhat/micropython,drrk/micropython,alex-robbins/micropython,emfcamp/micropython,pozetroninc/micropython,bvernoux/micropython,dinau/micropython,Peetz0r/micropython-esp32,tralamazza/micropython,pfalcon/micropython,henriknelson/micropython,martinribelotta/micropython,henriknelson/micropython,mpalomer/micropython,MrSurly/micropython,TDAbboud/micropython,tobbad/micropython,tuc-osg/micropython,adafruit/circuitpython,infinnovation/micropython,adafruit/circuitpython,alex-robbins/micropython,supergis/micropython,tobbad/micropython,danicampora/micropython,alex-march/micropython,deshipu/micropython,matthewelse/micropython,infinnovation/micropython,supergis/micropython,trezor/micropython,torwag/micropython,EcmaXp/micropython,lowRISC/micropython,dxxb/micropython,oopy/micropython,AriZuu/micropython,ryannathans/micropython,alex-robbins/micropython,MrSurly/micropython-esp32,tuc-osg/micropython,selste/micropython,misterdanb/micropython,hosaka/micropython,tobbad/micropython,redbear/micropython,ernesto-g/micropython,hosaka/micropython,Peetz0r/micropython-esp32,mpalomer/micropython,ryannathans/micropython,pozetroninc/micropython,martinribelotta/micropython,adafruit/micropython,micropython/micropython-esp32,adafruit/micropython,galenhz/micropython,ernesto-g/micropython,martinribelotta/micropython,infinnovation/micropython,tralamazza/micropython,PappaPeppar/micropython,puuu/micropython,tobbad/micropython,trezor/micropython,blazewicz/micropython,AriZuu/micropython,dxxb/micropython,cwyark/micropython,pramasoul/micropython,Timmenem/micropython,adamkh/micropython,xhat/micropython,torwag/micropython,mhoffma/micropython,chrisdearman/micropython,HenrikSolver/micropython,MrSurly/micropython,hiway/micropython,tuc-osg/micropython,cwyark/micropython,oopy/micropython,MrSurly/micropython,dxxb/micropython,turbinenreiter/micropython,danicampora/micropython,matthewelse/micropython,trezor/micropython,kerneltask/micropython,blmorris/micropython,adamkh/micropython,selste/micropython,lowRISC/micropython,swegener/micropython,ruffy91/micropython,dmazzella/micropython,pfalcon/micropython,HenrikSolver/micropython,adamkh/micropython,mpalomer/micropython,SHA2017-badge/micropython-esp32,alex-robbins/micropython,drrk/micropython,infinnovation/micropython,infinnovation/micropython,dmazzella/micropython,selste/micropython,EcmaXp/micropython,toolmacher/micropython,TDAbboud/micropython,jmarcelino/pycom-micropython,mianos/micropython,ryannathans/micropython,misterdanb/micropython,ganshun666/micropython,lowRISC/micropython,MrSurly/micropython-esp32,EcmaXp/micropython,mianos/micropython,mhoffma/micropython,pfalcon/micropython,henriknelson/micropython,SHA2017-badge/micropython-esp32,PappaPeppar/micropython,blazewicz/micropython,dxxb/micropython,HenrikSolver/micropython,hiway/micropython,adafruit/micropython,neilh10/micropython,matthewelse/micropython,toolmacher/micropython,MrSurly/micropython-esp32,cwyark/micropython,ruffy91/micropython,Timmenem/micropython,kerneltask/micropython,bvernoux/micropython,emfcamp/micropython,Timmenem/micropython,ernesto-g/micropython,HenrikSolver/micropython,dinau/micropython,pramasoul/micropython,blmorris/micropython,kerneltask/micropython,swegener/micropython,neilh10/micropython,adafruit/circuitpython,puuu/micropython,mpalomer/micropython,MrSurly/micropython-esp32,oopy/micropython,TDAbboud/micropython,deshipu/micropython,swegener/micropython,torwag/micropython,Peetz0r/micropython-esp32,supergis/micropython,ruffy91/micropython,alex-march/micropython,dxxb/micropython,drrk/micropython,jmarcelino/pycom-micropython,hosaka/micropython,ruffy91/micropython,SHA2017-badge/micropython-esp32,matthewelse/micropython