arm-none-eabi-gcc: error: unrecognized debug output level 'cc'

[duglah]

Hello everybody,

currently compiling a sketch on MacOS failes with the error: arm-none-eabi-gcc: error: unrecognized debug output level 'cc'.

It seems to be similar to https://github.com/per1234/ArduinoCore-sam/commit/9d7496e21d12eabc76117f870a234855e2070e22 .

System: macOS 11.2 Arduino IDE 1.8.13 or VScode 1.54.3 MXChip IoT DevKit: 2.0.0

Steps to reproduce:

1. Open any example
2. Try to compile for MXChip AZ3166