Adding the required steps to docs/UPDATING
Adding the required steps to docs/UPDATING

Change-Id: If0cbfd473374cfbc0c174ae5ccd52668adbcfcf7

veritas-shine/minix3-rpi,veritas-shine/minix3-rpi,veritas-shine/minix3-rpi,veritas-shine/minix3-rpi,veritas-shine/minix3-rpi,veritas-shine/minix3-rpi,veritas-shine/minix3-rpi,veritas-shine/minix3-rpi