tools/mpy-tool.py: Raise exception if trying to freeze relocatable mpy.
tools/mpy-tool.py: Raise exception if trying to freeze relocatable mpy.

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