Add initial README for new jenkins sub-directory
Add initial README for new jenkins sub-directory

Currently there is a bit of bash scripting in the jenkins jobs
themselves which is not under source control or reviewed when changes
are made. Fix this by checking in here and relegating the jenkins job to
just cloning this repo and executing these scripts.

Change-Id: I83bfdfee983473a023271637f976974a5fdc0065
Signed-off-by: Andrew Geissler <f7919ac9f8ec0c3ffbc3f483da625c634fd31638@yahoo.com>

openbmc/openbmc-build-scripts,openbmc/openbmc-build-scripts