Use test matrix to build examples #229

Job	Run time
lint	15s
test	1m 21s
examples (uno, custom_hal)	1s
examples (uno, morse)	1s
examples (uno, candle)	1s
examples (uno, multiled)	1s
examples (uno, user_func)	1s
examples (uno, hello)	1s
examples (uno, breathe)	1s
examples (uno, simple_on)	1s
examples (uno, fade_on)	1s
examples (uno, sequence)	1s
examples (esp01, custom_hal)	34s
examples (esp01, morse)	17s
examples (esp01, candle)	33s
examples (esp01, multiled)	33s
examples (esp01, user_func)	33s
examples (esp01, hello)	31s
examples (esp01, breathe)	33s
examples (esp01, simple_on)	32s
examples (esp01, fade_on)	34s
examples (esp01, sequence)	32s
examples (nano33ble, custom_hal)	1s
examples (nano33ble, morse)	1s
examples (nano33ble, candle)	1s
examples (nano33ble, multiled)	1s
examples (nano33ble, user_func)	1s
examples (nano33ble, hello)	1s
examples (nano33ble, breathe)	1s
examples (nano33ble, simple_on)	1s
examples (nano33ble, fade_on)	1s
examples (nano33ble, sequence)	1s
examples (esp32dev, custom_hal)	31s
examples (esp32dev, morse)	21s
examples (esp32dev, candle)	33s
examples (esp32dev, multiled)	20s
examples (esp32dev, user_func)	1s
examples (esp32dev, hello)	32s
examples (esp32dev, breathe)	33s
examples (esp32dev, simple_on)	1s
examples (esp32dev, fade_on)	31s
examples (esp32dev, sequence)	32s
examples (nucleo_f401re, multiled_mbed, --project-option="framework=mbed", cpp)	1s
	11m 4s

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