py/showbc: Make printf's go to the platform print stream.
py/showbc: Make printf's go to the platform print stream.

The system printf is no longer used by the core uPy code.  Instead, the
platform print stream or DEBUG_printf is used.  Using DEBUG_printf in the
showbc functions would mean that the code can't be tested by the test
suite, so use the normal output instead.

This patch also fixes parsing of bytecode-line-number mappings.

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