tf-a-builder: extract the UART message to the corresponding log files

Retrieve LAVA test plain log and split the UART message to the
corresponding log files by log-splitter.py

Signed-off-by: Arthur She <arthur.she@linaro.org>
Change-Id: Id8d1fc16c4ace63adeab7e18aeaa5cf1d9ca04b5
3 files changed