add foundation libc to CI #159

Job	Run time
Unit Test Regz (ubuntu-latest)	21s
Unit Test Regz (windows-latest)	1m 54s
Unit Test Regz (macos-latest)	24s
Build (ubuntu-latest)	28s
Build Examples (espressif/esp)	2m 8s
Build (windows-latest)	1m 16s
Build Examples (gigadevice/gd32)	2m 10s
Build (macos-latest)	39s
Build Website	22s
Build Examples (microchip/avr)	2m 22s
Build Examples (microchip/atsam)	1m 59s
Check that stm32 generated code is up to date	39s
Build Examples (nordic/nrf5x)	2m 0s
Unit Test Ports (ubuntu-latest, gigadevice/gd32)	25s
Build Examples (nxp/lpc)	2m 3s
Unit Test Ports (ubuntu-latest, raspberrypi/rp2xxx)	33s
Build Examples (stmicro/stm32)	37s
Unit Test Ports (ubuntu-latest, stmicro/stm32)	17s
Unit Test UF2 (ubuntu-latest)	18s
Build Examples (raspberrypi/rp2xxx)	2m 23s
Unit Test Ports (windows-latest, gigadevice/gd32)	1m 9s
Validate Foundation Libc (ubuntu-latest)	14s
Unit Test UF2 (windows-latest)	1m 38s
Unit Test Ports (windows-latest, raspberrypi/rp2xxx)	1m 8s
Validate Foundation Libc (windows-latest)	1m 17s
Unit Test UF2 (macos-latest)	28s
Unit Test Ports (windows-latest, stmicro/stm32)	1m 45s
Validate Foundation Libc (macos-latest)	23s
Unit Test Ports (macos-latest, gigadevice/gd32)	32s
Unit Test Ports (macos-latest, raspberrypi/rp2xxx)	38s
Dry Run Packaging	40s
Unit Test Ports (macos-latest, stmicro/stm32)	27s
	33m 37s

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