esp32/Makefile: Add correct arch to MPY_CROSS_FLAGS for native code.
esp32/Makefile: Add correct arch to MPY_CROSS_FLAGS for native code.

MrSurly/micropython,trezor/micropython,MrSurly/micropython,adafruit/circuitpython,kerneltask/micropython,tobbad/micropython,selste/micropython,adafruit/circuitpython,tobbad/micropython,trezor/micropython,kerneltask/micropython,pozetroninc/micropython,henriknelson/micropython,trezor/micropython,bvernoux/micropython,tobbad/micropython,pramasoul/micropython,bvernoux/micropython,kerneltask/micropython,adafruit/circuitpython,kerneltask/micropython,pozetroninc/micropython,trezor/micropython,pramasoul/micropython,bvernoux/micropython,selste/micropython,MrSurly/micropython,pozetroninc/micropython,selste/micropython,MrSurly/micropython,bvernoux/micropython,pramasoul/micropython,adafruit/circuitpython,pramasoul/micropython,tobbad/micropython,trezor/micropython,pramasoul/micropython,selste/micropython,bvernoux/micropython,henriknelson/micropython,henriknelson/micropython,tobbad/micropython,henriknelson/micropython,adafruit/circuitpython,selste/micropython,adafruit/circuitpython,henriknelson/micropython,pozetroninc/micropython,MrSurly/micropython,kerneltask/micropython,pozetroninc/micropython