Use test matrix to build examples #225

Job	Run time
test	1m 14s
lint	5s
examples (uno, custom_hal)	18s
examples (uno, morse)	2s
examples (uno, candle)	20s
examples (uno, multiled)	1s
examples (uno, user_func)	1s
examples (uno, hello)	1s
examples (uno, breathe)	19s
examples (uno, simple_on)	1s
examples (uno, fade_on)	22s
examples (uno, sequence)	1s
examples (esp01, custom_hal)	39s
examples (esp01, morse)	35s
examples (esp01, candle)	34s
examples (esp01, multiled)	33s
examples (esp01, user_func)	35s
examples (esp01, hello)	35s
examples (esp01, breathe)	34s
examples (esp01, simple_on)	34s
examples (esp01, fade_on)	34s
examples (esp01, sequence)	35s
examples (nano33ble, custom_hal)	28s
examples (nano33ble, morse)	27s
examples (nano33ble, candle)	27s
examples (nano33ble, multiled)	26s
examples (nano33ble, user_func)	22s
examples (nano33ble, hello)	28s
examples (nano33ble, breathe)	27s
examples (nano33ble, simple_on)	23s
examples (nano33ble, fade_on)	27s
examples (nano33ble, sequence)	26s
examples (esp32dev, custom_hal)	40s
examples (esp32dev, morse)	40s
examples (esp32dev, candle)	40s
examples (esp32dev, multiled)	40s
examples (esp32dev, user_func)	29s
examples (esp32dev, hello)	39s
examples (esp32dev, breathe)	45s
examples (esp32dev, simple_on)	41s
examples (esp32dev, fade_on)	44s
examples (esp32dev, sequence)	40s
examples (nucleo_f401re, multiled_mbed, --project-option="framework=mbed")	7s
	19m 39s

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