96boards-tools: add initial recipe
96boards-tools: add initial recipe

* udev rule for standard UART device name
* boot script to resize rootfs to match partition size on first boot

Signed-off-by: Nicolas Dechesne <05fca36dfcf68f7e1c9eaf62b074676ab50a133b@linaro.org>

fboudra/meta-96boards,kraj/meta-96boards,kraj/meta-96boards,mrchapp/meta-96boards,96boards/meta-96boards