layers.conf: use upstream meta-smartphone repo

* we don't have any wp specific patches anymore

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
layers.txt: use jansa/master branches for layers

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
jenkins-job.sh: Add script to perform different jenkins jobs

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>