Tracking: Port `libtock-sync` to Yield-WaitFor

[bradjc]

All synchronous library operations should use the Yield-WaitFor system call instead of yield_for().

libtock-sync/crypto:

• hmac.c
• sha.c

libtock-sync/display:

• screen.c
• text_screen.c

libtock-sync/interface:

• button.c
• buzzer.c
• console.c
• usb_keyboard_hid.c

libtock-sync/kernel:

• read_only_state.c

libtock-sync/net:

• ieee802154.c
• lora_phy.c
• udp.c

libtock-sync/peripherals:

• adc.c
• crc.c
• gpio_async.c
• gpio.c
• rng.c
• rtc.c
• spi_controller.c
• spi_peripheral.c
• usb.c

libtock-sync/sensors:

• ambient_light.c
• humidity.c
• moisture.c
• ninedof.c
• pressure.c
• proximity.c
• rainfall.c
• sound_pressure.c
• syscalls
• temperature.c

libtock-sync/sensors/syscalls:

• temperature_syscalls.c

libtock-sync/services:

• alarm.c
• unit_test.c

libtock-sync/storage:

• app_state.c
• isolated_nonvolatile_storage.c
• kv.c
• nonvolatile_storage.c
• sdcard.c