Add show_updates script and call it after updating

This just summarizes the changes made in the latest updates via git shortlog.

Signed-off-by: Christopher Larson <chris_larson@mentor.com>
clone: exclude eldk

Signed-off-by: Christopher Larson <chris_larson@mentor.com>
clone: update url grabbing bits

Signed-off-by: Christopher Larson <chris_larson@mentor.com>
clone: also pull down git.yoctoproject.org repositories

Signed-off-by: Christopher Larson <chris_larson@mentor.com>
update: handle failed updates at the end, rather than aborting immediately

Signed-off-by: Christopher Larson <chris_larson@mentor.com>
clone: use curl -s for yocto too

Signed-off-by: Christopher Larson <chris_larson@mentor.com>