TF-M: Add setup-ssh and fix permissions

setup-ssh is required for YADP, also the jar file has never been
readable by the buildslave user. Lets fix this.

Signed-off-by: Benjamin Copeland <ben.copeland@linaro.org>
Change-Id: I2076bb62eefc9c0a09612a0d3e62bfdbc9ef8c37
2 files changed