stm32/boards: Add common_basic.ld for a board to have a single section.
stm32/boards: Add common_basic.ld for a board to have a single section.

henriknelson/micropython,MrSurly/micropython,pfalcon/micropython,bvernoux/micropython,adafruit/micropython,pramasoul/micropython,trezor/micropython,kerneltask/micropython,MrSurly/micropython,ryannathans/micropython,adafruit/circuitpython,swegener/micropython,ryannathans/micropython,adafruit/circuitpython,tralamazza/micropython,trezor/micropython,adafruit/micropython,bvernoux/micropython,adafruit/circuitpython,adafruit/micropython,tobbad/micropython,selste/micropython,adafruit/circuitpython,selste/micropython,adafruit/micropython,selste/micropython,henriknelson/micropython,pfalcon/micropython,pfalcon/micropython,tralamazza/micropython,kerneltask/micropython,tobbad/micropython,kerneltask/micropython,bvernoux/micropython,adafruit/circuitpython,pfalcon/micropython,dmazzella/micropython,bvernoux/micropython,kerneltask/micropython,pozetroninc/micropython,selste/micropython,henriknelson/micropython,pramasoul/micropython,ryannathans/micropython,pozetroninc/micropython,bvernoux/micropython,tralamazza/micropython,pfalcon/micropython,swegener/micropython,swegener/micropython,pramasoul/micropython,pramasoul/micropython,MrSurly/micropython,swegener/micropython,trezor/micropython,tralamazza/micropython,dmazzella/micropython,tobbad/micropython,adafruit/micropython,MrSurly/micropython,pozetroninc/micropython,selste/micropython,pozetroninc/micropython,ryannathans/micropython,swegener/micropython,pozetroninc/micropython,dmazzella/micropython,dmazzella/micropython,trezor/micropython,MrSurly/micropython,tobbad/micropython,ryannathans/micropython,kerneltask/micropython,trezor/micropython,henriknelson/micropython,pramasoul/micropython,tobbad/micropython,henriknelson/micropython,adafruit/circuitpython