TCC/TC pull request

removing the merge lines

variant.c instead of TC/TCC information

Conflicts:
	hardware/arduino/samd/cores/arduino/validation/build_as6/test.atsuo
	hardware/arduino/samd/cores/validation/validation_core/build_as6/test.cppproj
	hardware/arduino/samd/cores/validation/validation_core/test.cpp

Fix UART baudrate and EDBG.

Conflicts:
	hardware/arduino/samd/variants/arduino_zero/variant.cpp

- Update test.cpp
- Add support of wiring_analog.c in AS6 test project
- Modify variant for PWM generation on LED (pin 13)

the moment